Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

How to test for acids and bases? In this activity you and your child can make your own indicator from red cabbage!

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

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Science fair project which teaches you how to make your own homemade glue by combing curdled milk with baking soda.

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

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

In this science project, learn about water transport in plants and make a beautiful dyed floral arrangement with cohesion, adhesion, and xylem tubes!

What makes your shadow dance around all day? Let's play detective and find out why that sneaky shadow never stays in one place for long.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

Kids will discover the meat science behind the meat they eat, and find out how to use safe chemistry to make meat more tender.

This activity challenges students to use computational thinking as they create a sequence of commands that will make a robot navigate around several obstacles.

Use this fun activity to make an optical illusion picture that helps your kindergartener explore the sense of sight, and sharpen his observation skills!

Want to help make studying the nervous system a little more fun? This thinking cap is a great way to learn external human brain anatomy.

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

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 construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.