How clean is the air we breathe? The answer might surprise you. Learn how to investigate local air quality with this cool science fair project.

In this science fair project, students examine under what conditions individual plants release seeds and how far the seeds are released.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

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.

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

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

In this project, a model of a submarine is built to simulate the buoyancy and displacement of water and air.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

The goal of this science fair experiment is to demonstrate the effects of air pressure on objects and analyze applications of air pressure principles.

This science fair project idea identifies the properties of soap bubbles and invents a new or improved bubble solution.

This science fair project idea compares biodiversity between drops of water.

This science fair idea project identifies the active ingredients in soap and experiments with the properties of soap.

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

This science fair project idea determines what household items are good conductors of electricity.

In this science and engineering activity, children will explore types of tunnels and their purposes and then design and build a tunnel of their own.

This science fair project idea examines the reason boats are shaped and engineered.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.