Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

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.

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

This science fair project examines how seeds hitchhike on animals and clothing.

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

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.

How does smell affect taste? Ready your taste buds--in this project, you'll gather some test subjects and do a taste test to see how much smell affects taste.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

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

In this science experiment, your child will test the strength of hollow structures in order to understand how strong bird bones really are.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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.

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

Have you ever wondered how many numbers most people can memorize? Test your friends to find out!

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

Experiment with buoyancy to learn how a submarine rises and sinks in this classic science experiment.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

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

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

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

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

In this cool experiment, learn how to find specific gravity of minerals using liquids of different densities to see which substances and items sink and float.

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

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