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.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

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 craft is an excellent way to learn about African-American history, and it also provides fine motor practice.

With this hands-on activity, you'll show how fall colors are hidden in the leaf all year long!

In this activity your child will make a coiling snake out of simple household materials, and also find out why they coil.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

This science fair project idea measures out the sugar of various foods and find out whether people can correctly determine how much sugar is in common foods.

Find out which type of sponge holds the most water.

Find out whether matte or shiny nail polish lasts longer.

Find out which kind of bubble wrap fares best when put in impact.

Find out whether putting something on top of a plant will inhibit its growth.

The goal of this project is to create an exciting topographical map out of dough.

In this fun experiment, we'll find out how color affects heat absorption!

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

Check out this cool science fair project on identifying rocks and minerals for kids.

Do different types of oil mix or stack? Find out in this science fair project idea!

Find out whether a longer airplane will fly farther or a wider paper airplane.

Test your friends to find out if you can replicate the placebo effect's incredible results.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Find out whether packaged seeds actually do expire in this new science fair project idea.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

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

Find out whether cast iron or regular teflon pans heat up faster and also retain their heat longer.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!