free science experiments for preschoolers

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50 Science Activities For Preschoolers

Curious kids turn into junior scientists with these fun and easy preschool science experiments . Th ese science activities for preschoolers are doable and use simple supplies for home or in the classroom. Plus, you can scale any of these activities to use with kindergarten through elementary-age students!

Science for Preschoolers Engages the Senses

Preschool science encourages observations of the five senses, including sight, sound, touch, smell, and sometimes taste. The more kids can fully immerse themselves in an activity, the greater their interest will be !

Kids are naturally curious creatures, and once you have piqued their curiosity, you have also activated their observation, critical thinking, and experimentation skills.

These science activities are perfect for the senses, allowing play and exploration without adult-led directions. Kids will naturally start to pick up on the simple science concepts presented just by having a fun conversation about it all with you!

• 5 Senses Exploration Station
• 5 Senses Coloring Book (Free)
• 5 Senses Discovery Bags
• Apple Taste Test with the 5 Senses
• Pop Rocks and 5 Senses

Seasonal Science Activities for Preschoolers

Click on each link below for full instructions. Also, look through our seasonal preschool science activities and grab the free science experiment cards!

• Spring Preschool Science Experiments
• Fall Preschool Science Experiments: apples and pumpkins
• Winter Preschool Science Experiments

Living Things

💡 Many of the preschool science projects below can be adapted to your kids’ current level. Also, these are perfect for kids of multiple ages to work together in small groups.

Animal Habitats

Fun printable animal habitat activities for preschoolers. Introduce different animal habitats through matching games to craft activities.

Butterfly Life Cycle

Explore the butterfly life cycle with a free printable pack and butterfly sensory bin idea. Or create an edible butterfly life cycle instead!

Celery and Food Coloring

Watch how water moves through a plant with a simple celery food coloring science experiment!

Color Changing Flowers

Have you ever changed the color of a flower? Try this color-changing flower science experiment and learn about how a flower works! Or why not try growing your own flowers with our list of easy flowers to grow .

Growing Grass Heads In A Cup

Grass seeds are easy seeds to grow for kids. Make these fun grass heads in a cup and give them a haircut when they grow long.

Lettuce Growing Activity

Set up a lettuce growing station. This is fascinating to watch and pretty quick to do. We watched the new lettuce grow taller each day!

Parts of an Apple

Explore the parts of an apple with this printable apple coloring page. Then cut up some real apples to name the parts and enjoy a taste test or two!

Parts of a Pumpkin

Learn about the parts of a pumpkin with this fun pumpkin coloring page! Find out the names of pumpkin parts, what they look and feel like, and what parts of a pumpkin are edible. Combine it with a pumpkin playdough activity !

Find out how to make seed bombs for a great hands-on preschool plant activity or even to give as gifts. All you need are some flower seeds and scrap paper.

Seed Germination Jar

Our simple seed jar science activity is one of our most popular science activities for preschoolers. It is an excellent way to see up close how a seed grows!

Simple Chemistry

Alka seltzer chemical reactions.

Make an Alka Seltzer Rocket , try a simple Alka Seltzer Experiment or a homemade Lava Lamp to check out this neat chemical reaction.

Baking Soda and Vinegar

Who doesn’t like a fizzing, foaming eruption? From an erupting lemon volcano to our simple baking soda balloon experiment. . Check out our list of baking soda science activities to get started!

Bouncy Egg Experiment

Ah, the egg in vinegar experiment. You need a little patience for this one {takes 7 days}, but the end result is really cool!

Explore the simple science of bubbles with these easy bubble experiments ! Can you make a bubble bounce? We have a recipe for the perfect bubble solution too.

Check out even more bubble fun with 2D bubble shapes or 3D bubble shapes , bubble painting , and bubble snakes !

Bursting Bags

Definitely take this bursting bags science activity outside! Will it pop? This science activity will have you on the edge of your seat!

Butter In A Jar

The science you can spread with a tasty homemade butter, after a good workout for the arms anyway!

Candy Science

Play Willy Wonka for a day and explore candy science with floating m&m’s, chocolate slime, dissolving candy experiments, and more!

Chick Pea Foam

Have fun with this taste-safe sensory play foam made with ingredients you probably already have in the kitchen! This edible shaving foam, or aquafaba as it is commonly known, is made from the water chickpeas are cooked in.

Crystal Growing

Growing crystals is simple! You can easily grow your own crystals at home or in the classroom with our step by step instructions. Grow borax crystals, sugar crystals or rock candy and even salt crystals.

Fizzing Lemonade

Explore the senses and a little chemistry with our fizzy lemonade recipe.

Ice Cream In A Bag

Homemade ice cream is yummy, edible science with only three ingredients! Don’t forget the winter gloves and sprinkles—this gets cold!

Magic milk is one of our most popular science experiments. It is also just plain fun and mesmerizing!

Oobleck is 2 ingredient fun! A simple recipe using kitchen cupboard ingredients, but it is the perfect example of a non-Newtonian fluid. Also makes for fun sensory play!

Every kid should build a volcano with a simple chemical reaction, baking soda and vinegar! Build a sandbox volcano or a LEGO volcano ! Learn about fun volcano facts too!

Physical Science

Balloon race cars.

Explore energy, measure distance, build different cars to explore speed and distance with simple balloon cars. You can use Duplo, LEGO, or build your own car.

Balloon Rocket

Gas, energy, and power! Set up a simple balloon rocket and observe Newton’s Laws at work. All you need is a string, a straw, and a balloon!

Color Mixing

Color mixing is a science. Learn colors through play with these preschool color activities .

What goes up must come down. Have young kids explore concepts in gravity around the house or classroom with simple objects you already have.

Grow a Rainbow

A fun and colorful experiment that uses a paper towel, markers and water to demonstrate the process of capillary action.

What’s magnetic? What’s not magnetic? You can set up a magnet science discovery table for your kids to explore and this fun magnet activity !

Make Rainbows

Play with various ways to separate visible light into the colors of the rainbow.

Mirrors and Reflections

Mirrors are fascinating and have wonderful play and learning possibilities plus it makes for great science!

Ramps and Friction

We use cars and balls all the time with our rain gutters! Even flat pieces of wood or stiff cardboard work! Newton’s laws of motion really come alive with simple toy cars and homemade ramps.

Shadow Science

Explore shadows in several ways! Make shadows with your body (fun outdoor play and learning idea) and animal shadow puppets to check out!

Make a toy zipline for LEGO mini-figures and explore science concepts through play.

Technology and Engineering

Build bridges.

This bridge building activity is an easy engineering project for young kids. It starts with the planning and designing process and ends with the building process. Construct your own bridge from simple supplies.

Build Towers

Kids love building, and building structures is a great activity that incorporates many skills and is also frugal. Check out a variety of building activities .

Water and States of Matter

Check out how different materials absorb water with this simple what absorbs water activity. 

Density of Liquids

Can one liquid be lighter than the other? Find out with this easy liquid density experiment!

Ice Melt Science

An ice melt activity is a simple science you can set up in many different ways with many themes. It is a playful and hands-on way for young kids to observe how a solid changes to a liquid. Check out our list of ice activities for preschool.

Another must try science experiment using oil and water, a lava lamp experiment is always a favorite!

Sink or Float

Test whether objects sink or float in the water with common household items. Plus, grab the free printable worksheets to add to extend the activity.

Solid, Liquid, Gas Experiment

Set up a quick and simple states of matter experiment with kids, This solid, liquid, and gas activity uses very few supplies but demonstrates the concepts easily!

What Dissolves In Water

Explore what solids dissolve in water and what do not with items from the pantry. A fun introduction to solutions!

Weather Science

Four seasons.

Get ready for a fantastic journey through the four seasons! With these printable seasons worksheets , explore the unique characteristics of each season, the weather changes, the types of clothes we wear, and the fun activities we can enjoy throughout the year! Pair them with these seasons activities for kids .

Name The Weather

Grab this free weather playdough mat set for kindergarten and preschool weather activities. Perfect for adding to a weather theme science center! Pair it with this fun weather sensory bin .

Rain Cloud In A Jar

Kids will love this hands-on rain cloud activity with shaving cream! A fun way to explore the question, why does it rain?

How Does Rain Form

Where does rain come from? If your kids have asked you this question, this rain cloud weather activity is the perfect answer!

Tornado In A Bottle

Create a tornado in a bottle and study the weather safely!

Water Cycle In A Bottle

How does the water cycle work? Make a water cycle discovery bottle to check it out up close! Learn how water cycles through the Earth’s oceans, land, and atmosphere with a simple to make water cycle model.

How to Teach Science to Preschoolers

Teaching science to preschoolers is a wonderful way to spark their curiosity about the world around them. Making the learning process fun, engaging, and age-appropriate is essential.

Make sure to check out…

• STEM for Toddlers
• STEM for Kindergarten
• STEM for Elementary

Begin by incorporating hands-on activities and experiments that encourage exploration and observation. Use simple and relatable examples from their everyday lives, such as observing plants grow, mixing colors, or exploring the properties of water.

Encourage questions and provide simple explanations that align with their level of understanding. Picture books can also be valuable tools for teaching science concepts. Add fun themes and colors for the holidays and seasons!

Additionally, fostering a sense of wonder and excitement about the natural world will lay a strong foundation for their future scientific learning. Remember that patience, repetition, and a nurturing environment are key to helping preschoolers develop a lifelong love for science.

Helpful Resources

Check out the links below to prepare yourself, your family, or your classroom for these easy preschool science experiments and activities. The key to success is in the preparation!

• Preschool Science Center Ideas
• Sensory Science Activities
• Fine Motor Activities
• Preschool Math Activities
• STEAM Books with Activities for Kids
• Make a homemade science kit that’s inexpensive!

Science Activities By Age Group

• Science for Toddlers
• Science for Kindergarten
• Elementary Science by Season
• Science for 1st Grade
• Science for 2nd Grade
• Science for 3rd Grade

Printable Preschool Pack

Get ready to explore this year with our growing Preschool STEM Bundle ! Or grab the individual packs.

What’s Included:

There are 12 fun preschool themes to get you started. This is an ” I can explore” series! You’ll find both seasonal and non-seasonal themes appropriate to preschool learning throughout the year.

Each unit contains approximately 15 activities, with instructions and templates  as needed. Hands-on activities are provided to keep it fun and exciting. This includes sensory bins, experiments, games, and more! Easy supplies keep it low-cost, and book suggestions add learning time.

22 Comments

Hi, this sounds like a neat activity for young toddlers to explore for texture. Could u please share the ingredients. My profession is in childcare. The children would like this activity I believe. Again, please share your slime recipe. Thank you!! LaTonia Jackson Armstrong

Hi! You simply need to click through the liquid starch slime link or get your recipe here box. However, I would suggest one of our taste safe slime recipes for toddlers as regular slime contains borax, sodium borate, or boric acid. These slimes should not be tasted!

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It’ fun for kids to experiment and science activities of any kind are a great way to encourage kids to explore. I will encourage my son about this hope so he will enjoy it. Thanks for the sharing such a interesting article.

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40 Fun & Easy Preschool Science Experiments

Welcome to our collection of fun and easy science experiments, especially handpicked for our tiniest tinkerers and budding scientists. These experiments provide a safe and engaging environment for children to observe, question, and discover.

Activities on this list aren’t about complex theories or lengthy explanations; they’re about the joy of discovery, the magic of “why,” and the thrill of the “aha!” moment.

In the age of preschool kids, curiosity knows no bounds. Every raindrop is a mystery, every shadow a playful game, and every bubble a burst of joy. At this tender age, the line between magic and science is delightfully blurred, making it the perfect time to embark on whimsical experiments that tickle the imagination while fostering a foundational love for the wonders of the world.

Guided by experienced educators, each experiment is thoughtfully crafted to ensure age-appropriate materials, simple instructions, and plenty of opportunities for hands-on exploration.

1. Floating Dry Erase Rainbow and Shapes Experiment  

The Floating Dry Erase Rainbow and Shapes Experiment is a captivating preschool science activity that engages young minds while introducing fundamental concepts of buoyancy and color mixing.

Learn more: Team Cartwright

2. The Oil and Water Experiment- Density Science

By combining oil and water in a clear container, students observe the distinct separation between the two substances due to their different densities.

Learn more: Play Trains

3. Make Ice Grow

This experiment sparks curiosity and wonder and teaches children about the states of matter and the scientific principle of freezing.

Learn more: Teach Preschool Org

4. Ice Cream in a Bag

The “Ice Cream in a Bag” experiment is a delightful preschool science activity combining hands-on fun and a tasty treat.

Learn more: Ice Cream in a Bag

5. Magic Milk

The “Magic Milk” experiment with fizzing milk is a captivating preschool science activity that combines chemistry and visual spectacle.

Learn more: Magic Milk

6. Walking on Raw Eggs

By placing raw eggs in a row on the ground and carefully stepping on them, students discover that the eggs can withstand their weight without breaking.

This experiment not only sparks excitement and awe but also encourages children to question and investigate the strength and structure of objects.

Learn more: Housing a Forest

7. Unicorn Fizz 

The “Unicorn Fizz” experiment is a delightful preschool science activity that brings together a sense of wonder and the magic of unicorns.

Learn more: Unicorn Fizz 

8. Unpoppable Bubbles

This hands-on and interactive activity encourages exploration, experimentation, and a sense of achievement when bubbles refuse to burst, making it a must-try for young scientists ready to challenge the laws of bubble physics.

Learn more: Unpoppable Balloons

9. Melting Ice

It’s a simple yet engaging activity that lays the foundation for understanding the principles of thermodynamics and encourages scientific inquiry, making it an ideal experiment for young learners eager to explore the wonders of science.

Learn more: Melting Ice

10. Exploring How Water Travels Through Leaves

The “Exploring How Water Travels Through Leaves” experiment is an exciting preschool science activity that allows children to discover the wonders of plant biology.

Learn more: Buggy and Buddy

11. Pepper and Soap

By sprinkling pepper onto a bowl of water and then gently touching the surface with a soapy finger, students witness the mesmerizing movement of pepper particles as they scatter away from the soap.

Learn more: Pepper and Soap

12. Rain Cloud in a Jar

This hands-on activity encourages observation, critical thinking, and a deeper understanding of weather phenomena, making it an exciting and educational experience for young learners eager to explore the science behind rain.

13. Making Color Disappear

The “Making Color Disappear” experiment is a captivating preschool science activity that introduces children to the magical world of color mixing.

Learn more: Making Color Disappear

14. Elephant Toothpaste

This hands-on and engaging activity fosters scientific inquiry, observation, and a sense of wonder, making it a must-try for young scientists eager to explore the fascinating world of chemistry.

Learn more: Elephant Toothpaste

15. Play Dough Volcano

This is a sensory and interactive activity that encourages exploration, observation, and scientific inquiry, making it a must-try for young scientists eager to unleash their inner volcanologists and have a blast while learning about the wonders of the natural world.

Learn more: Play Dough Volcano

16. Skittles Rainbow

By arranging a circle of colorful Skittles candies on a plate and adding a small amount of warm water, students can observe as the colors dissolve and blend together, creating a beautiful rainbow pattern.

Learn more: Skittles Rainbow

17. Rainbow Tower

By layering different liquids of varying densities, such as water, oil, and colored syrup, students can create a stunning rainbow tower in a clear container.

18. Balloon-Powered Car

By constructing a simple car out of everyday materials and attaching a balloon as the power source, students can witness the car zooming forward as the air escapes from the balloon.

19. Wind-Powered Car

By constructing a simple car using lightweight materials and attaching a small sail, students can observe how the wind propels the car forward.

20. Travelling Waters

The “Travelling Waters” experiment is a captivating preschool science activity that explores the concept of water absorption and movement.

21. Leak-proof Bag

Get ready to discover the wonders of a leak-proof bag experiment! This engaging pre-school science activity is a must-try for young explorers

Learn more: Leak-proof Bag

22. Magnetic Discovery Bottles

By filling transparent bottles with a combination of water, glitter, and an array of magnetic objects, children can witness the mesmerizing dance of magnetic forces.

Learn more: Magnetic Discovery Bottles

23. Water Xylophone

As they experiment with water levels and observe the corresponding changes in pitch, they’ll develop a deeper understanding of sound and vibrations.

24. Balloon Rocket Science

This hands-on activity not only sparks excitement but also introduces basic physics concepts in a playful and interactive manner.

25. LEGO Ice Excavation

Get ready to embark on a cool and captivating journey with LEGO ice excavation! This thrilling preschool science experiment is a must-try for young adventurers.

Learn more: LEGO Ice Excavation

26. Edible Butterfly Life Cycle

As they assemble and devour their edible creations, children will gain a deeper understanding of the miraculous transformation that butterflies undergo.

Learn more: Little Bins Little Hands

27. Penny Boat

As they experiment with different shapes and sizes, they’ll learn about buoyancy, weight distribution, and the principles of floating.

28. Salt Painting

Get ready to unleash your creativity with salt painting! This exciting pre-school art activity is a must-try for young artists. By using a mixture of salt, watercolors, and paper, children can create stunning and textured paintings.

Learn more: Salt Painting

29. String Telephone

This hands-on activity not only sparks imagination but also introduces the concept of sound transmission and vibrations.

Learn more: String Telephone

30. DIY Straw Rockets

Get ready for an exciting DIY adventure with straw rockets! This thrilling preschool science experiment is a must-try for young rocket scientists.

Learn more: DIY Straw Rocket

31. Dancing Corn

Through this simple yet enchanting experience, children will grasp the concept of air pressure and buoyancy in a fun-filled manner.

32. Egg Drop Challenge

The Egg Drop Challenge not only sparks enthusiasm for science but also nurtures teamwork and perseverance in little ones.

Learn more: Egg Drop Challenge

33. Rubber Egg (Egg in Vinegar)

Welcome to the fascinating world of the “Rubber Egg” experiment, where curious young minds will witness the extraordinary transformation of a regular egg into a bouncy, rubbery wonder!

34. LEGO Zipline

By constructing a simple zipline using LEGO bricks and a string, children get hands-on experience with the principles of gravity, motion, and engineering.

Learn more: LEGO Zipline

35. Blow Cup Challenge

The Blow Cup Challenge is a delightful and captivating preschool science experiment that will leave young learners amazed and eager to explore.

By blowing air into the cup, they witness the fantastic force of air pressure propelling the rocket upwards.

Learn more: Erintegration

36. How Strong Is the Spaghetti?

Through hands-on experimentation, they discover the principles of balance, stability, and load-bearing capacities.

This experiment not only encourages creativity and problem-solving but also introduces early engineering concepts in an engaging and approachable manner.

Learn more: Frugalfun4boys

37. Simple Static Electricity Experiment

The Simple Static Electricity Experiment offers an electrifying experience for preschoolers that sparks curiosity and wonder.

In this captivating activity, children explore the fascinating world of static electricity by rubbing balloons against different materials and observing the surprising effects.

38. Sedimentary Rocks Model

The Sedimentary Rocks Model offers an immersive and educational preschool science experiment that takes young learners on a fascinating geological adventure. In this hands-on activity, children get to create their own sedimentary rock models.

Learn more: Preschool Powol Pockets

39. Layers of the Earth

Through hands-on exploration, children will create a simplified Earth model using different materials to represent its layers: the crust, mantle, and core.

By understanding the composition of our planet, they’ll gain insight into the forces that shape the Earth’s surface and its interior.

Learn more: Red Ted Art

40. LEGO Pendulum Painting

By experimenting with different string lengths, weights, and paint colors, they discover how the motion of the pendulum influences the patterns it creates.

Learn more: LEGO Pendulum

Similar Posts:

• Top 100 Fine Motor Skills Activities for Toddlers and Preschoolers
• 68 Best Chemistry Experiments: Learn About Chemical Reactions
• Top 58 Creative Art Activities for Kids and Preschoolers

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58 Easy and Fun Science Activities for Preschool

Introduce curious little minds to a world of discovery.

Every day is a new opportunity for our youngest learners to ask “Why?” over and over. Tap into that curiosity with these fun and engaging science activities for preschoolers. These simple experiments incorporate many preschool favorites like playing with bubbles or water, making arts and crafts, and, of course, making a mess!

To make things even easier, we’ve rated every one of these science activities for preschoolers based on difficulty and materials.

Difficulty:

• Easy: These are low- or no-prep experiments you can do pretty much anytime
• Medium: These take a little more setup or a longer time to complete
• Advanced: Experiments like these take a fairly big commitment of time or effort
• Basic: Simple items you probably already have around the house
• Medium: Items that you might not already have but are easy to get your hands on
• Advanced: These require specialized or more expensive supplies to complete

Water Preschool Science Experiments

Stem challenges for preschoolers.

• Seasonal Preschool Science Activities

More Science Activities for Preschoolers

Plus, click the button below to receive a copy of our free printable Science Experiment Recording Sheet.

These water activities for preschoolers help teach little learners a variety of science concepts. (These can get a little messy, so you might want to try them outside.) Find even more water science activities here.

1. Make music with xylophone bottles

Difficulty: Easy / Materials: Basic

The classic experiment using varying levels of water in glasses or bottles is even more fun when you add some food coloring. Experiment with different water depths and mallet styles to make all kinds of beautiful music.

Learn more: Xylophone Bottle

2. Make giant bubbles

Difficulty: Easy / Materials: Medium

Kids (and let’s face it, adults too) will definitely get a kick out of this fun science experiment. Learn how to make the bubble solution as well as the giant wand in our free video at the link below.

Learn more: Giant Bubbles

3. Watch rice dance in water

There are lots of cool baking-soda-and-vinegar experiments out there ( ever made your own volcano ?), but this one is always a favorite with little ones. The acid-base reaction causes the rice to dance and jump around in the water for an effect that is just so cool!

Learn more: Dancing Rice

4. Reveal colors with chemical reactions

Preschool science experiments often include a combination of baking soda and vinegar like this one. Fill muffin tins with a drop of food coloring, then top it with baking soda. Finally, let kids squirt in vinegar to reveal fabulous foamy hues. (Be sure to wear eye protection for this one.)

Learn more: Fizzy Fun

5. See what sinks and what floats

This preschool science activity helps kids learn to construct a hypothesis, conduct a simple experiment, and then sort their findings by property.

Learn more: Sink or Float Experiment

6. Learn what dissolves in water

Engage in more water play by having kids predict which items will dissolve in water and which ones won’t. Have kids keep track of the results so they can see if they have anything in common.

Learn more: What Dissolves in Water?

7. Watch hot water rise and cold water sink

This early exploration into the concept of density is always impressive to see in action. Have kids discover how hot water rises and cold water sinks. Explain that the same applies to air, and see if kids can think of a way to observe that in action too.

Learn more: Water Density Experiment

8. Grow a paper towel rainbow

“Capillary action” might be a real mouthful for preschool science students, but they don’t need to remember the term to be impressed by this experiment. All you need are markers, a paper towel, and two glasses of water.

Learn more: Capillary Action Experiment

9. Make shaving cream rain clouds

One of our favorite science activities for preschoolers. This is a classic science activity every kid should try at least once. It helps them understand how clouds become so saturated with water that they must release it in the form of rain.

Learn more: Shaving Cream Rain Clouds

10. Blow bubble towers

There are lots of fun science activities you can do with bubbles to explore concepts like surface tension. Or you can just have a blast seeing who can make the tallest tower with bubbles and straws.

Learn more: Bubble Towers

STEM challenges give students a chance to try solving problems on their own. Give them some basic supplies and instructions, then let them experiment until they find a solution to the challenge.

11. Rescue toys from hot lava

While you might not want pre-K kids climbing all over the classroom furniture to play “The Floor Is Lava,” they can do the same thing with their toys in this cute STEM challenge.

Learn more: The Floor Is Lava

12. Build a catapult

Challenge students to build a catapult using just three items: Popsicle sticks, elastics, and a plastic spoon or bottle cap. You’ll definitely want to have an extra set of adult hands available as this can prove challenging for pre-K kids. Finally, bring plenty of marshmallows or pom-poms to launch.

Learn more: Popsicle Stick Catapult

13. Discover strength in shapes

Learn shapes while also practicing some basic science. Fold paper into various shapes to form columns and ask kids to predict which will be able to support the most books.

Learn more: Which Shape Is Strongest?

14. Build an aluminum foil boat

Teach kids about buoyancy and physics while having fun in the process. First, give your students some tinfoil and challenge them to build a sturdy boat. Then, challenge them to fill the boat with as many objects, such as gems, as they can without it sinking.

Learn more: Aluminum Foil Boat

15. Waterproof a boot

Ask kids to select various materials and tape them over the free boot printable found at the link. Then, test their hypotheses to see which ones work best.

Learn more: Waterproof a Boot

16. Reach for the sky

Round up all your building blocks and try this whole-class project. What will students need to do to be able to construct a tower that reaches all the way to the ceiling?

Learn more: Tower Engineering Challenge

17. Link up the longest paper chain

This incredibly easy preschool STEM activity really gets kids thinking. The challenge? Create the longest possible paper chain using a single piece of paper. So simple and so effective.

Learn more: Paper Chain Challenge

18. Build an apple-toothpick tower

Put a healthy spin on a classic STEM challenge by substituting apple pieces for marshmallows. Kids will have a tasty snack when they’re done!

Learn more: Apple Toothpick Tower

19. Stack up plastic cups

Kids absolutely love stacking cups ! Turn the play into a STEM challenge by adding index cards into the mix. Kids can experiment to see if they can build taller towers with or without the cards.

Learn more: Solo Cup Engineering Challenge

20. Craft a nest

Take a nature walk and pick up items like sticks, leaves, and more. Then, build your own bird nests to protect little eggs and hatchlings.

Learn more: Build a Nest at Pink Stripey Socks

21. Be bridge-builders

Use everyday classroom objects to build bridges and test their strength. See how many objects (beads, toys, school supplies, etc.) each bridge can hold before it collapses.

Learn more: Build a Bridge

22. Construct with egg carton building blocks

These colorful building blocks are not only pleasantly tactile, they’re made from bio-degradable materials. A win-win!

Learn more: Egg Carton Building Blocks

23. Put together a tinker kit

Young kids really don’t need fancy, expensive equipment to learn about and enjoy science. A basket full of everyday items, most available at the dollar store, and a big imagination are all it takes.

Learn more: Tinker Kit

Seasonal Science Activities and Experiments for Preschoolers

Whether you’re looking for Halloween science activities , winter science experiments , or Easter egg activities , find them all (and more) here!

24. Make artificial snow

No snow where you live? Make some yourself! Find easy recipes for “snow” using baking soda, shaving cream, cornstarch, and other household items. Experiment to find the one that works best.

Learn more: Make Pretend Snow

25. Explore how mittens keep you warm

Ask little ones if mittens are warm, and they’ll likely answer yes. But when they measure the temperature inside an empty mitten, they’ll be surprised by what they find. Learn about body heat and insulation with this easy experiment.

Learn more: Mitten Body Heat Experiment

26. Measure the water content of snow

Two inches of snow is not the same as 2 inches of rain. This easy winter science experiment measures the amount of water actually found in an inch of snow.

Learn more: How Much Water Is in Snow?

27. Grow grass in an eggshell

Difficulty: Medium / Materials: Medium

What’s more fun than a preschool science experiment that doubles as a craft? You’ll need eggs, soil, grass seeds, water, and a permanent marker to bring this project to life. Kids will especially love personalizing their eggshell.

Learn more: Egg Grass Heads

28. Observe a pumpkin decomposing

Difficulty: Easy / Materials: Easy

When Halloween is over, plop your jack-o’-lantern pumpkin in the garden and observe it each day. Kids will learn how organic matter breaks down over time.

Learn more: Pumpkin Decomposition

29. Send a ghost flying with magnets

Use magnets along with a few other supplies to make a tissue ghost seem to float in midair! It’s the perfect spooky Halloween science activity for preschoolers.

Learn more: Flying Ghosts

30. Conduct experiments using marshmallow Peeps

Pick up a package of marshmallow Peeps (they’re usually available during all seasons of the year now), and try turning them into little boats. Experiment with different sail sizes and types, and figure out how to make the candy boats go faster.

Learn more: Marshmallow Peep Boat Challenge

31. Launch plastic egg rockets

Put on some safety goggles and get ready for liftoff! This simple experiment uses Alka-Seltzer tablets to turn eggs into rockets.

Learn more: Easter Egg Rockets

32. Dissolve colorful turkey “feathers”

Baking-soda-and-vinegar experiments are always popular, and this one is so cute for the Thanksgiving season. Build your own little turkey with baking soda feathers, then watch them foam up and dissolve when you add some vinegar.

Learn more: Turkey Feather Science

These science activities and experiments give preschoolers a chance to explore all sorts of science concepts, from plants and animals to germs and gravity and beyond.

33. Make a bouncy egg

Difficulty: Medium / Materials: Basic

Never underestimate the power of vinegar! See the striking result when you soak an egg in vinegar for hours.

Learn more: Bouncy Eggs

34. Learn about the plant life cycle in a hands-on way

Inspire a passion for gardening by planting seeds and watching them grow together. Download our free worksheets and classroom slides for an entire plant unit below.

Learn more: Plant Life Cycle Resources

35. Boogie down with some popcorn

Try this super-fun experiment that gets popcorn dancing! Then, make a little popcorn in the microwave, put on some music, and have a dance party.

Learn more: Dancing Popcorn

36. Slice apples to learn about oxidation

Here’s another classic preschool science activity: using apple slices to learn about oxidation (and how to prevent it). When you’re done, you’ve got a tasty snack to eat too.

Learn more: Apple Oxidation

37. Show why sunscreen is important

First, have your students make four construction-paper people, each with varying conditions. Wrap one in plastic wrap, cover another in sunscreen, put a hat on one and a set of sunglasses on another. Ask kids to hypothesize what will happen when they’re left out in the sun, then see if they’re right!

Learn more: Sunscreen Experiment

38. Engage in shadow science

Set blocks or small shaped objects on a sheet of paper. Then set the paper in direct sunlight. Watch as the shadow changes throughout the day. Have students trace the shadows with a pencil or marker.

Learn more: Shadow Science

39. Mix up some “magic” milk

A drop or two of dish soap will make food coloring dance and swirl across the surface of a shallow bowl of milk. Preschool science experiments often seem like magic, but this one is all about surface tension and chemical reactions.

Learn more: Magic Milk

40. See how easily germs spread

We love science activities for preschoolers that remind them of the importance of good handwashing. Help them see why it’s so important with this simple experiment that uses glitter to stand in for germs.

Learn more: Teach Kids About Germs Using Glitter

41. Experiment with wax paper

This wax paper experiment is interesting from both a science and an art perspective. Ask kids to think about why wax paper behaves differently than other paper they use for art projects.

Learn more: Wax Paper Resist

42. Predict and observe what will melt in the sun

You’ll need a hot sunny day for this preschool science experiment. Help students choose a variety of items to place into a muffin tin and have them predict which ones will melt. Set the tin out in the sun for an hour or two, then bring it in and record your results.

Learn more: Melting Science

43. Drop balls to introduce gravity

Gravity can be a complicated subject, but all pre-K kids need to understand the basics. Drop balls of all sizes to discover that they all fall in the exact same way.

Learn more: Ball Drop Gravity Race

44. Head to the playground to explore gravity and friction

What goes up must come down! A playground slide is the perfect place to help kids understand gravity. This is a good chance to learn about friction too.

Learn more: Playground Science

45. Test objects with magnets

Magnets are undeniably a source of fascination for kids. At this stage, you can worry less about explaining how magnets work and instead just let kids explore which items are attracted to magnets and which aren’t. Sort the items into categories, then see if the items have anything in common.

Learn more: Magnet Experiments

46. See sound waves in action

This series of simple experiments lets kids see sound waves at work. Start by making waves with a Slinky , then move on to tuning forks and bouncing confetti.

Learn more: Sound Experiment

47. Make an orange volcano

Making erupting volcanoes is a staple of any childhood! We love this easy volcano experiment using an orange, baking soda, and vinegar.

Learn more: Orange Volcano

48. Grow delicious rock candy crystals

Preschoolers love science activities that involve food. While crystal experiments are a hit with kids of any age, this one is perfect for the young crowd. It requires a little patience, but kids get to eat the yummy results!

Learn more: Kool-Aid Rock Candy

49. Move pom-poms with air pressure

Understanding the idea that air can have enough force to move objects can be a little challenging, but this simple experiment brings that concept to life. We love that this experiment is affordable since most people (especially teachers) already have these materials on hand.

Learn more: Air Pressure Experiment

50. Make a balance scale

This simple balance scale is so easy to make yet provides endless opportunities for weighing all kinds of objects. Have kids assemble a scale from a plastic hanger, a few paper cups, and some string, then let them hypothesize which items will be heavier and which will be lighter.

Learn more: DIY Balance Scales

51. Explore the principle of static electricity

The concepts of negative and positive properties of atoms may be way over the heads of preschoolers, but this fun activity is perfect for introducing the magic of science to them.

Learn more: Static Electricity Activity

52. Make an ocean in a bottle

Oil, water, and food coloring combine to create a mesmerizing mini ocean in a bottle.

Learn more: Ocean in a Bottle

53. Explore the concept of density

Why do some objects float and some sink? Does it matter what type of liquid you put them in? Explore these questions and more with this simple activity.

Learn more: Egg Float

54. Make ice grow

Just like your favorite character from the movie Frozen , your preschoolers can have the power to make ice grow! This simple crystallization experiment will make a big impact on your little ones.

Learn more: Frozen Fun

55. Watch leaves turn colors

Learn how a leaf gets nourishment through its network of veins, which act as a transportation route for nutrients from the stem to the tips of the leaf.

Learn more: Colored Leaves

56. Make pepper dance

This science experiment is a perennial crowd favorite! Simply combine dish soap and water (and food color, if you wish) on a dish. Then cover the surface with a generous amount of pepper. Your preschoolers will giggle when the pepper scatters to the edges of the dish when they touch it with their finger.

Learn more: Dancing Pepper

57. Cook up a batch of elephant toothpaste

Brace yourself for a crazy eruption of giant foam when you try this fun experiment with your preschool students. Psst: It’s all in the power of yeast.

Learn more: Elephant Toothpaste

58. Concoct a batch of invisible ink

Introduce your students to the secret power of invisible ink with this simple recipe. Easy to assemble, totally nontoxic, and loads of fun!

Learn more: Invisible Ink

Get my free printable

If you liked these science activities for preschoolers, grab a copy of our free printable recording sheet for your students, which can be used with any of the science experiments above.

Like these science activities for preschoolers? Don’t miss the 30 Best Educational Toys and Games for Preschool .

Plus, get all the latest teaching tips and ideas when you sign up for our free newsletters .

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30 Amazing Science Activities and Experiments for Preschoolers

From science experiments to sensory explorations to STEM and STEAM activities, these science activities for preschoolers are sure to be a hit!

Science Experiments for Preschoolers

If you are looking for simple science experiments and activities to do with preschoolers, then this list is perfect for you.

Your kids are sure to have a blast exploring science!

My kids love science investigations so I am making a point of doing more of them. To get myself started, I decided create a collection of my favorite science activities.

Since I know many of you are also looking for science experiments and activities to do with preschoolers, I decided to share them here for you too.

If you are looking for science activities for preschoolers, this is going to be a HUGE help to you.

Top 30 Science Activities for Preschoolers

Lava Lamp Experiment

This lava lamp experiment is a HUGE hit with kids. It is one of our most popular science activities. I bet your kids will enjoy it too!

Leak-Proof Bag Science Experiment

Want to really WOW your kids? Try out this leak-proof bag science experiment . It’s like a magic trick, but it’s really science!

Make a Rain Cloud in a Jar

Make a rain cloud in a jar and develop fine motor skills too! This science activity allows young children to explore and investigate what happens when it rains.

Oil and Water Science Exploration

This oil and water science exploration is a fun and colorful way to observe how oil and water don’t mix together.

Fun and Colorful Skittles Rainbow Experiment

Grab some Skittles and water and make a Skittles rainbow for a fun and colorful surprise!

Magic Milk Experiment

Kids will be amazed by this Magic Milk Science Experiment !

Clouds and Rain Science Investigation

Explore clouds and rain with a simple science investigation that will totally engage young kids.

Color Changing Flowers Experiment

Dye flowers a variety of colors with this Color Changing Flowers Experiment .

Rust Resistant Magnetic Discovery Bottle

This Rust Resistant Magnetic Discovery Bottle  is a super cool way to explore magnetism.

Explore Colors with fun Chemical Reactions

This science activity encourages kids to explore colors with chemical reactions . It’s also a great way to develop fine motor skills.

Fun Weather Activity

This weather activity  combines a popular book and a classic experiment to introduce kids to tornadoes.

Learn about Animal Habitats

Teach kids about animal habitats while Sorting Animals on a Venn Diagram . It’s really easy to set up and even toddlers can participate.

Walking Water Science Experiment

This awesome Walking Water Science Experiment  will wow kids all of ages!

Learn about Water Density

Make a Rainbow Jar  and introduce young children to density. It’s really neat.

Dancing Raisins are a Blast

The kids will get a kick out of this super cool dancing raisins science experiment !

Water Xylophone Fun

This Water Xylophone Science Experiment  combines music and science. It’s easy enough for your kids to make too.

Dancing Rice Investigation

Amaze your kids with Dancing Rice ! This baking soda and vinegar investigation is very intriguing.

Shaving Cream Clouds

These shaving cream clouds are so gorgeous! I can’t wait to do this one!

Inflate a Balloon with Baking Soda and Vinegar

Did you know that you can inflate a balloon with baking soda and vinegar ? You have to try this one!

Solar System Scavenger Hunt

My kids absolutely love this Solar System Scavenger Hunt ! It’s a fun way to introduce preschoolers to the solar system and planets within it.

More Lava Lamp Fun

Your kids will love this super cool Lava Lamp Science Experiment .

Zones of the Ocean Sensory Bottle

Introduce preschoolers to the Zones of the Ocean  with these engaging sensory bottles!

Make a Pully to learn about Machines

Make a pulley and teach kids about simple machines with this activity that will have kids moving and learning!

Growing Plants Science Activity

This Growing Plants Science Activity  is a fantastic way to teach kids about plants! It even includes a observation sheet that is easy enough for preschoolers to use. (not pictured)

Explore Ramps and Friction

Explore ramps and friction with this super simple science activity for kids!

Ocean in a Bottle

This ocean in a bottle looks amazing! It is a great way to explore oil and water.

Dinosaur Excavation Activity

Did you know you can make your own dinosaur excavation activity and only use two simple ingredients that you probably have in your house? It’s really cool!

Static Electricity Butterfly Experiment

This static electricity butterfly experiment is so neat. It’s very easy to make and you’ll be surprised by how long this will occupy your kids.

Fun Preschool Science Activities

Baking Soda and Vinegar Reactions

My kids absolutely love baking soda and vinegar reactions ! This post will tell you how to get really amazing reactions.

Explore what Melts

Explore what melts in the sun with this fun science experiment. It’s perfect for a warm, sunny day.

Water Cycle in a Bag

Teach kids about the water cycle with this Water Cycle in a Bag ! It’s perfect for young children.

Lego Volcano

Kids will have a blast building a LEGO Volcano and watching it erupt.

Oobleck Recipe

This oobleck recipe is a fun and easy science activity for kids! You just need 2 ingredients and your kids will be ready for lots of fun sensory play!

Rainbow Walking Water

You won’t believe how fun this walking water experiment is for kids! They will love watching the water travel up the paper towel and seeing all of the colors mix.

Keep Paper Dry under Water

Our kids loved this simple keep paper dry under water science experiment. They were amazed when the paper didn’t even get wet!

Grow a Rainbow Science Experiment

This Grow a Rainbow science experiment was a blast! It is a simple way for young kids to learn about capillary action!

Catapult STEM Activity

This catapult activity is a fun and easy STEM activity that your kids will love!

Fireworks in a Jar

Your kids will love seeing the Fireworks in a Jar reactions in this easy experiment!

Floating Dry Erase Marker

This  floating dry erase marker  science activity is easy and fun! You just need dry erase markers and water!

Dancing Corn Science Activity

This dancing corn science activity  is quick to setup and you just need a few ingredients you can find around your house.

School • Things To Do

18 Easy Science Experiments Perfect for Preschoolers

September 9, 2021

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Science projects are the perfect messy fun! Packed with messy appeal for young kids, but also packed full of the learning opportunities that appeal to parents! Get started with these easy science experiments that are perfect for preschoolers and toddlers .

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These easy science experiments are perfect for preschool aged children. Many of them would be great for older children too, so they could be enjoyed together as a family activity.

You May Also Enjoy 10 Fun Ideas for Entertaining Preschoolers at Home

Easy Science Experiments for Preschoolers

#1. ice and salt experiment.

Image: Learning & Exploring Through Play

I think I enjoyed this fascinating salt and ice experiment just as much as Little N (toddler)! As you observe the salt melting craters into the ice, that’s where the colouring seeps through and creates beautiful coloured tunnels.

You May Also Enjoy 28 Rainbow Inspired Activities for Kids

#2. Colour Mixing on Coffee Filters

Image: Messy Little Monster

Using primary colours (red, yellow and blue) and coffee filters, why not explore the different secondary colours you can create? Kids can see for themselves all the different shades of colours that can be made by mixing 2 (or more) colours together.

It is fascinating to watch as the paint spreads and is absorbed by the the coffee filters. Messy Little Monster uses jumbo eye droppers to make this simple colour mixing activity that works on fine motor skills.

#3. Make Glow in the Dark Bubbles

Make your very own glow in the dark bubbles for hours of outdoor fun!

You May Also Enjoy 7 Simple Sensory Box Ideas

#4. Pop, Rock Balloons

Image: A Little Pinch of Perfect

This is a great idea from A Little Pinch of Perfect for pop rock balloons .

As the Pop Rocks and the soda make little bubbles, when they pop, the air inside the bubbles fills the balloon right in front of your very eyes!

#5. Create Fizzy Lemonade

Image: Learn with Play at Home

What a fun idea! Why not let your preschool create their very own edible science experiment? This fizzing lemonade experiment from Learn With Play at Home is the perfect little experiment before meal time.

#6. Simple Colour Mixing Science

Image: My Mundane and Miraculous Life

Simple? Fun? Educational? – Check!

Sometimes the most simple set-ups are enjoyed the most. Most preschoolers LOVE water play, and this easy colour mixing science experiment  from My Mundane and Miraculous Life is sure to be popular. Simply add some food colouring and away they go, creating lots of different colours!

#7. Little Scientist Space

Image: Epic Childhood

Perhaps you want to create a space that offers lots of experimenting and imaginative play? Epic Childhood has some great ideas for little scientists in this post , where they share their set-up.

You May Also Enjoy 5 Fun Science Experiments for Kids

#8. Colourful Milk Experiment

Image: Crafts by Amanda

This colourful milk experiment from Crafts by Amanda is fascinating, and all it requires is milk, food colouring and dish soap. There is a great video to go along with it too, as well as explanations around the science behind the fun!

#9. Walking Water

Image: Parenting Chaos

This colour-mixing activity is pretty awesome! A beautiful rainbow experiment, creating colours through walking water  from Parenting Chaos. Using some simple tools your little ones will look on in amazement as new colours are created before their very eyes!

You May Also Enjoy 27 Innovative Water Play Ideas for Kids

#10. Water Bottle Fountain

Add a twist to your water play and create your very own fountain! This water bottle fountain experiment from Learn with Play at Home allows children to see that air takes up room and is always present even though we can’t see it.

#11. Oil and Water Discover Bottles

Image: Play Trains

Children of this age love transferring, filling and emptying containers. By adding a couple of simple ingredients you can extend their play by allowing them to explore changes that take place when you combine oil and water . Get the instructions over at Play Trains.

You May Also Enjoy 5 Fun Halloween Science Experiments

#12. Rainbow Eruptions

Image: Learn Play Imagine

How beautiful do these rainbow eruptions   from Learn Play Imagine look? Using 2 simple ingredients you too could be enjoying rainbow eruptions with your little ones!

#13. Fireworks in a Jar

Image: I Can Teach My Child

Is your little one fascinated with colours and fireworks? Then this fireworks in a jar project from I Can Teach My Child is for you! The great thing about this experiment is you will most likely have all the ingredients you need at home already.

#14. Colouring Flowers/Vegetables

• Colouring Wild Carrot – Fireflies and Mudpies
• Colouring Roses – Hello, Wonderful
• How Does a Plant Drink? – SFI (Science Foundation Ireland)
• Dye one flower two colours! – Homegrown Friends

#15. Soap Clouds

Image: Our Best Bites

Soap clouds , like these ones from Our Best Bites, smell divine! They are also great for sensory play and your children can stand and watch the ‘cloud’ forming too. Get the details at Our Best Bites.

#16. Rainbow Paper

Image: The Science Kiddo

Look how effective this rainbow paper is – and it only takes 5 minutes to create! The project and instructions can be found at The Science Kiddo .

#17. Sink or Float

Image: The Joys of Boys

This couldn’t be easier – a container of water and a hunt around the home for items, is all that’s needed.

Enjoy this Sink or Float experiment from The Joys of Boys and take it in turns to predict if you think an item will sink or float. A great way to teach mathematical concepts too!

#18. Cress Heads

You May Also Enjoy: Tips for Making Gardening Fun for Kids

Stop by  Learning and Exploring Through Play for lots more ideas for activities for little learners.

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