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

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

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.

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.

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

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

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

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.

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.

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.

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.

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.

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

This science fair project explores how osmotic pressure forces water through the root up into the plant.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Demonstrate how to tell the age of an egg without having to crack it open.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

Check out this fun science fair project to make a vinegar and baking soda balloon and demonstrate how gas is created as a result of the chemical reaction.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.