Learn about this simple machine and make a pulley of your own to use for fun science trials.

Make a backbone model to explore human anatomy and life science.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

It's not actually that hard to get energy from garbage! Kids learn how to make biogas in the form of methane with this cool and easy science fair project idea.

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.

This science fair project idea teaches to understand and explore the concepts of crystal formation and dissolving substances.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair experiment idea's objective is to understand the general concept of an acid and a base.

Learn whether writing things down really makes things easier to remember.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this science fair project, students make their own rain gauge to measure rainfall.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

In this science fair project you will make a model of a cell membrane using very simple material.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Learn how to make a food pyramid with animals in a a coniferous forest ecosystem around your home.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Discover that the absorbency of fabrics depend largely on the shape and structure of the individual fibers that make up the fabric.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

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.

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