How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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

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

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

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

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

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

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This classic children's game demonstrates how sound travels through air vs. through a solid.

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 do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

This quick and simple preschool mirror activity will introduce your child to the science of reflection and light with a flashlight experiment and picture game.

An home science experiment for older students that teaches about the science behind heat.

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.

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

Water can go from solid to liquid to gas...but how does popcorn go from kernel to snack? Invite your first grade scientist to find out.

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

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

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.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Make meringues with your first grader and see how states of matter can transform before your very eyes. Here's how:

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

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

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

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.