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

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

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

Learn how to grow an avocado plant indoors with your 1st grader in this hands-on gardening activity.

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

Start thinking about how the internet works by assembling an Ethernet cable of your own!

Want to get your bookworm interested in science? Check out this cool activity that teaches kids how to write science fiction!

How can Hooke's law explain how springs work? Learn about how Hooke's law is at work when you exert force on a spring in this cool science project.

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.

This science fair project idea investigates how images are influenced by changes in light.

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

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.

How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

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

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.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

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

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

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

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

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

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

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.