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

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.

Learn how to make a weathervane with this fun and simple meteorology project for fourth graders.

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

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

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

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.

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.

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

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

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.

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.

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

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.