This science fair project idea experiments with spinning color wheels and optical illusions.

This science fair project idea produces varying pitches of sound.

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.

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.

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

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

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

Celebrate April Fools' Day with a science prank that is sure to amuse...and educate too!

Make a DIY golf putter and design your own golf putting course in this 2nd-3rd grade arts and crafts/game activity.

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

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

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

Combine the science of physics with the fun of playing spy. Your young detective can make his own tiny looking glass. It's simple to make!

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

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Your second grader will love this simple soda bottle race car activity. Make a ramp and customize your car for an entertaining way to learn scientific concepts.

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

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

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

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

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

Did you ever think you could make colors disappear right before your eyes? This science experiment is just like a magic trick: now you see it, now you don't!

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.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

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!