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Using a toy race car kids create a visual model of the Doppler Effect.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

This science fair project idea explores the different properties of matter.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

This science fair project idea investigates how magnetism can defy the force of gravity.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Try this fun and simple activity to help nurture your child's observation skills and nourish a growing love of science!

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Does your child always demand to know why the sky is blue, how the sun moves across the sky, or where wind comes from?

This science fair project teaches students the differences between fruits and vegetables.

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

Construct and experiment with a periscope using reflected light rays to gather an image.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Create a DIY Electromagnet! Using a 9v battery to create an electrical field around a nail, students explore electromagnetism in this cool science project idea.

Try this chemistry experiment with your curious kid and get some "shocking" results!