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.

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

How do people move pianos and heavy furniture into tall buildings? Show your kids some pulley potential with this simple household exercise!

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.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

How do we know that air exists when we can't see it, taste it, or touch it? Here's a classic experiment that will teach your kid some basics of aerodynamics!

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.

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

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.

Put a twist on traditional oil painting with this fun science activity that you and your first grader can do together.

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.

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

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.

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.

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.

Teach your child how butter is created by shaking up cream the old-fashioned way.

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

Explore the scientific concept of capacity by seeing how many pennies you boat can hold before it sinks!

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

Try this experiment to give your curious kid a more "solid" understanding of how temperature affects the states of matter.

Your child might have noticed how bubbles quickly lose their colors and pop. Check out this creative way to make those bubbles last longer.

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

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.

Help your first grader explore the world of scientific measurement by "weighing" fruit with a "water scale"!

This easy Halloween-themed science experiment for first-graders is perfect for chilly October afternoons or great as a Halloween party activity.

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!

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 project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

Teach your child about using pumps to move water in this simple and educational preschool science activity!