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.

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.

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.

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.

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.

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.

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.

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.

The next time you've got a restless second grade earth scientist on your hands, use this experiment to demonstrate crystals and make a tasty treat, too!

Think you can blow up a balloon without using your mouth? This isn't just a cool trick, it's also a great way to introduce chemistry and biology concepts.

Introduce your child to the world of motion and physics with a bit of marble play inspired by Sir Isaac Newton!

This science activity will help your student explore the changes that occur to transform an egg from raw to soft to hard-boiled.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

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

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

Wool can absorb 1/3 of its weight in water, while still keeping the body warm. She can test this theory by performing a scientific sock comparison!

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

Help your child explore chromatography, which is the process of separating colors or pigments, and create a neat art project in the process!