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

How much gas is released into your stomach by your favorite beverages? This project examines which beverages produce the most gas.

Learn how to make an anemometer with step-by-step instructions in this cool 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.

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 recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

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

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.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

The objective of this science fair project is to determine whether planaria reproduce asexually by regeneration.

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

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

Help kids tap into their inner inventor by teaching them how to make peanut butter through trial, error, and lots of taste testing!

Learn about the anatomy of the autonomic nervous system and its relationship to the rest of the body.

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

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

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

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.

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

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

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

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.

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

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

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

How do mirrors work? What is light, and how does it travel? Explore light and reflection with your preschooler with these simple hands-on experiments.

Do hand soaps and sanitizers prevent the growth of bread mold? If so, why? Kids will find out with this fun and informative science fair project idea.

This science fair project idea demonstrates how our fingers prune when in water.