This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

This science fair project idea explores whether talking to a plant will help it grow.

Help your child experiment with the combination of acid and baking soda by making these homemade bath bombs!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

What's a liquid? What's a solid? What better way to experiment than by turning a childhood favorite, ice cream, into a homemade science lesson!

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

Satisfy your sweet tooth with this easy summer activity! Make homemade ice cream and let your child practice his science skills.

If your science savy third grader is up for a challenge, let her bend light with a casserole dish!

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Magic, science, or household cleanser? Let your second grader decide with this practical, nontoxic chemistry experiment with acids and bases.

Here's a science experiment that gives your kids a chance to see how fire needs oxygen to burn, with a little math and writing practice thrown in.

It's easier than you think to make homemade play dough -- just a few pantry staples makes a natural version of the toy that kids have loved for generations.

Here's a fun math and science activity: help your child explore four different kinds of measurement, using their hand and a few simple household tools.

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.

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

How powerful is the reaction between baking soda and vinegar? Find out here!

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

Stir up some enthusiasm for experimentation with this candy-cracking science experiment!

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

Give your budding young observers a chance to discover simple machines at use in their own home.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

This science exploration lets your first grader see how eggs can provide a perfect environment for a living, growing creature.