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.

Take a nature walk in your backyard or local park to find one object for every letter of the alphabet. Then put them together in this handy nature book.

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!

Your kindergartener will make prints of his favorite fruits and vegetables and learn how to organize and assemble his very own book.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Let your kid experiment with textures among fabric and other materials that are smooth, rough, soft, or slippery—and then they'll make a texture book!

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.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

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.

Help your first grader design and create his very own bird feeder out of an empty milk carton.

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.

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

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

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

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

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.