Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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!

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

People have favorite flavors, but what about ants? Which ant food is the most popular?

This science fair project idea recreates the movement of planetary bodies in order to learn why they sometimes appear to move backwards.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

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

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

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

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

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.

examine how passive solar heating works, measure temperature in a parked car on a sunny day. ways to use passive solar heating as an alternative, energy

This science fair project idea determines the probability of a coin landing heads or tails.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

Could there be toxic chemicals lurking in the cupboards and closets of your home?

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

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.

Science fair project which teaches you about the principles of physics within a vacuum by creating a vacuum chamber.

This project uses science and art to help students learn and teach others about Earth's endangered and extinct species.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!