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

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

Inspire your child to put on her engineer hat for the day, as she builds her very own, double-decker bridge.

Teach your child some scientific basics as you explore the densities of various liquids in this fun experiment.

In this cool science fair project, kids apply basic algebra to learn how to make a PVC pipe instrument while exploring concepts like frequency and resonance.

What's the quickest way to separate salt and pepper? Let static electricity do the work! Your child will be fascinated by this simple experiment.

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.

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.

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

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

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

Help your kid feel like a superhero with this safe and fun science experiment that creates an electrical charge that's like a mini lightning bolt!

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

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

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Check out this mind-blowing experiment in which a hard-boiled egg will fit through an impossibly small opening with the help of only a few matches!

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

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

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Explore the wave-particle duality of light! Learn how light can behave as both a wave and a particle in this cool physics science fair project idea for kids.