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These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Your fourth grader will hone his fine motor skills and learn to follow directions as he creates this recycled angel tree topper out of an ordinary soda bottle!

Use the holiday gift giving season as an excuse to give your fourth grader a valuable lesson in making and keeping a budget!

As your fifth grader brainstorms and creates a plan for peace, your child will give his creativity and fine motor skills a boost!

In this hands-on design challenge your child will make their very own Rube Goldberg Machine.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Brine shrimp usually live in saltwater. Investigate how salt concentration (salinity) affects the rate at which brine shrimp eggs hatch.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

Science fair project about work and energy which uses a simple mathematical formula to predict how far a jar will roll down an incline.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Be active while learning about American history with this twist on the classic running game "Capture the Flag."

In this activity, your kid will watch coal turn into crystals right before her very eyes, and learn some science along the way!

This science project teaches students to classify different shapes of leaves.

This science fair project idea studies which kind of rock (sedimentary, igneous, or metamorphic) is most damaged by frozen water.

This science project challenges students to learn about and classify weeds and discover new practical uses for weeds.

Find out whether optical mice are useful on all surfaces or if there are drawbacks to this supposedly superior solution to the traditional roller-ball mouse.

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

This twist on the classic game of freeze tag spells fun for your fourth grader--and the whole family!

The human knot game is a perfect team-building exercise and a fun activity that's sure to bring lots of laughs along the way.

Take play-dough to the next level with this homemade recipe, adding surprising ingredients perfect for summer!

Your child can transform a triangle of felt into a colorful and motivating pennant sharing all her favorite characteristics and traits.

This Halloween, your child can make her very own jar light that will shine bright throughout the night!

Here's a black fuzzy spider that's sure to cause a silly fright! This eight-legged creepy crawler is sure to surprise anyone looking for a treat.

Here's a fun family activity: have your child make a cameo appearance by creating and drawing on their own silhouettes!

Show your child how to concoct a simple duo of household ingredients that changes color as acids and bases are added!