25 Simple Science Experiments To Try With Preschoolers At Home

Science experiments are an engaging method for introducing young children to the natural world’s wonders. By offering hands-on activities that are both fun and educational, you can foster curiosity, creativity, and a lifelong love of learning. 

These 25 easy preschool science experiments, which preschoolers can try with everyday materials, are perfect for sparking an early interest in science.

Science Experiments For Preschoolers

Science experiments are an engaging method for introducing young learners to basic science concepts. They are simple to set up and offer a mix of fun and discovery, making them ideal for preschoolers.

Why Science Experiments Are Important For Preschoolers?

Science experiments play a crucial role in a child’s early education. Here’s why they matter:

• Encourage thinking and curiosity: Simple science experiments introduce children to a world of questions and discovery, encouraging young kids to think critically.
• Develop problem-solving skills and creativity: Hands-on activities like building and testing help young learners develop essential skills.
• Introduce basic science concepts in a fun and interactive way: Experiments like mixing baking soda and vinegar make learning exciting.
• Foster a love of learning and exploration: These activities create an engaging environment that inspires exploration.
• Prepare children for future STEM education: Early exposure to science builds a strong foundation for STEM subjects.

Water Science Experiments

Water-based experiments are easy to set up and provide a wonderful way for kids to explore scientific principles.

Make Music With Xylophone Bottles

Create a xylophone using glasses or bottles filled with different levels of water:

1. Fill bottles with varying amounts of water.
2. Gently tap each bottle with a spoon to produce sound waves.
3. Experiment with materials like plastic or glass for unique tones.
4. Teach young kids about vibrations and sound waves.
5. Encourage creativity by composing simple tunes.

Watch Rice Dance In Water

This classic experiment introduces chemical reactions:

1. Before adding a tablespoon of baking soda, fill a glass halfway with water.
2. Drop in a few grains of uncooked rice.
3. Add vinegar and watch the rice “dance” as bubbles form and rise.
4. Discuss the chemical reaction and the concept of surface tension.
5. Enhance observation skills by asking kids to predict what might happen.

Create A Floating Egg Experiment

This fun activity demonstrates density and buoyancy principles:

1. Fill a clear glass halfway with water.
2. Carefully place an egg in the water and observe that it sinks.
3. Slowly add salt to the water, stirring to dissolve it.
4. Continue adding salt until the egg begins to float.
5. Discuss why the egg floats in salty water but sinks in plain water, introducing the concept of density.
6. Encourage young kids to test other objects in salty and plain water to see which floats or sinks.

Colour And Light Science Experiments

Exploring colour and light is a captivating way to teach children about science concepts such as capillary action and surface tension.

Create A Colour-Changing Milk Experiment

This fun science experiment uses food colouring and milk:

1. To a shallow dish of milk, add drops of food colouring.
2. Touch the surface of the milk with a cotton swab dipped in dish soap.
3. Watch as the colours swirl, demonstrating surface energy.
4. Develop observational and prediction skills.
5. Foster curiosity and creativity in young scientists.

Grow A Rainbow With Coffee Filters

This simple science experiment involves mixing colours:

1. Fold a coffee filter and place it in a cup with drops of food colouring.
2. Observe as the colours spread to create a rainbow.
3. Teach kids about capillary action and how colours mix.
4. Encourage creativity through experimentation.
5. Discuss the importance of water in this process.

Make A Shadow Art Experiment

Combine art and science to explore how light creates shadows:

1. Set up a light source, such as a flashlight or a sunny window.
2. Place small objects like toys, leaves, or blocks on a sheet of paper.
3. Shine the light to cast shadows of the objects onto the paper.
4. Trace the shadows with crayons or markers, creating unique shadow art.
5. Experiment by moving the light closer or farther away to observe shadow size and shape changes.

Fun Science Experiment: Homemade Lava Lamp

Lava lamps are a fun way to explore density and buoyancy with preschoolers.

Mix Vegetable Oil, Water, And Food Colouring

1. Combine vegetable oil, water, and a few drops of food colouring in a bottle.
2. Drop in an Alka-Seltzer tablet and watch the colourful bubbles rise.
3. Teach kids about density and how oil and water don’t mix.
4. Develop prediction skills as kids guess what will happen.
5. Encourage curiosity through this mesmerising visual demonstration.

Physics And Engineering Science Experiments

Introduce preschoolers to engineering and motion through simple experiments that challenge their problem-solving skills.

Build A Bridge With Popsticks

This activity encourages creativity and engineering skills:

1. Use popsticks and glue to build a bridge.
2. Test the bridge’s strength by placing small objects on it.
3. Teach kids about the importance of structure and design.
4. Foster problem-solving skills by encouraging them to improve their designs.
5. Make the learning process interactive and hands-on.

Create A Marble Run

This experiment combines physics with creativity:

1. Use cardboard, tape, and plastic straws to design a marble run.
2. Test the marble’s motion and adjust the run for speed or distance.
3. Introduce gravity and motion concepts to kids.
4. Develop problem-solving skills as kids refine their designs.
5. Keep kids engaged through experimentation and discovery.

Construct A Balloon-Powered Car

This fun experiment combines physics and engineering while sparking curiosity:

1. Gather materials like a small cardboard box, bottle caps for wheels, straws, tape, and a balloon.
2. Create a simple car by attaching the wheels to the box using straws as axles.
3. Ensure the balloon points backwards by attaching it to a straw and taping it to the vehicle.
4. Inflate the balloon, pinch the straw, and then release the car to watch it move.
5. Discuss how the escaping air propels the car forward, introducing concepts of force and motion.
6. Encourage kids to modify their designs to make the car go farther or faster.

Biology And Nature Science Experiments

Biology experiments allow preschoolers to explore the natural world in a hands-on way.

Grow A Plant In A Jar

Teach kids about plant life cycles with this simple activity:

1. Place a damp paper towel inside a jar.
2. Insert seeds between the towel and the glass.
3. Observe the seed’s growth over days, learning about sunlight and water’s role.
4. Discuss photosynthesis and plant biology.
5. Encourage curiosity about nature and the environment.

Observe Microorganisms In A Drop Of Pond Water

Introduce preschoolers to the microscopic world with this fascinating activity:

1. Collect a small water sample from a pond, stream, or puddle.
2. Place a drop of the water on a clear plastic or glass slide (child-safe beginner microscope kits are available online or at stores).
3. Using a magnifying glass or a basic microscope, you can observe tiny organisms like algae or microorganisms swimming in the water.
4. Discuss how these tiny creatures live and the role they play in nature.
5. Encourage kids to draw what they see and ask questions about the hidden world of water.

Chemistry And Materials Science Experiments

Chemistry activities are an excellent way to introduce young learners to chemical reactions and material properties.

Make Slime With Glue And Borax

This fun sensory play experiment introduces polymers:

1. Mix white glue, water, and a small amount of borax.
2. Add food colouring to make it visually exciting.
3. Teach kids about polymers and material properties.
4. Encourage creativity by experimenting with textures and colours.
5. Develop observation skills through hands-on activities.

Create A Homemade Volcano

This classic experiment uses baking soda and vinegar:

1. Shape clay around a small bottle to resemble a volcano.
2. Fill the bottle with baking soda, dish soap, and food colouring.
3. Add vinegar to trigger an eruption.
4. Introduce chemical reactions and discuss geology concepts.
5. Foster curiosity and encourage kids to predict outcomes.

Science Concepts: Stem Challenges And Activities

STEM challenges help kids explore basic science concepts through engaging and interactive activities.

• Walking Water Science Experiment: Use glasses, coloured water, and paper towels to explore capillary action.
• Melting Ice Challenge: Experiment with melting ice using salt and warm water.
• Leak-Proof Bag: Fill a plastic bag with water and pierce it with pencils to learn about polymers.
• Dry-Erase Marker Magic: Draw shapes with a dry-erase marker on a plate, add water, and watch them float.
• Balloon Rocket Experiment: Use a balloon, string, and straw to explore the principles of propulsion and Newton’s Third Law.
• Build a Paper Bridge: Challenge kids to design and build a paper bridge with the most weight.
• Egg Drop Challenge: Design a contraption that prevents a raw egg from breaking when dropped. Use various materials.
• Balloon Inflating Experiment: Use baking soda and vinegar in a bottle to inflate a balloon and demonstrate a simple chemical reaction.

In conclusion, preschoolers to science through simple, hands-on experiments nurtures their natural curiosity and builds a strong foundation for lifelong learning. These activities encourage children to observe, ask questions, and explore the world around them in a fun and interactive way. Whether watching rice dance in water, building a marble run, or creating a homemade volcano, young learners develop critical thinking, creativity, and problem-solving skills essential for future STEM success.

By incorporating these 25 easy and engaging experiments into everyday play, parents and caregivers can foster a deep love of science from an early age. Using common household materials and a spirit of exploration, children not only learn basic scientific concepts but also gain confidence in their ability to discover and experiment. Science becomes a natural and exciting part of their world, inspiring a passion for discovery that can last a lifetime.