In this science fair project, students create their own miniature salt flats at home.

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

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

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

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

In this science fair project, learn how to make gears and find out why they transmit torques in predictable ways.

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

Learn how to make a hygrometer to measure relative humidity in this project. Make a sling psychrometer hygrometer with gauze, thermometers, and a bottle.

Create safe lightning for kids! They'll learn how to make lightning at home with this fun science fair project idea illustrating static charges and grounding.

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

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?

This basketball project explores the best way to make the perfect shot every time.

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

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

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

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

Could there be toxic chemicals lurking in the cupboards and closets of your home?

Kids get step-by-step instructions for how to make a rubber band car and explore the physics of potential energy with this fun engineering science fair project.

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 biodiversity project examines the biodiversity in your own backyard.

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

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

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

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.