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Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

Slip some science into storm watching with a homemade rain gauge!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

The objective of this science fair project is to explore the relationship between acidic and basic compounds.

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.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

This science fair project idea explores whether white light can be separated into different colors.

Discover how and which salt melts ice the quickest.

Show your fourth grader how to see her heart in action. Make a simple device out of a drinking straw and clay to help her spot the movement of her pulse!

Find out whether packaged seeds actually do expire in this new science fair project idea.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

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

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

The purpose of this science fair project is to determine which conditions and materials quicken the composting process to make the best compost.

This interdisciplinary card game will have your third grader working on math facts as he travels through the solar system!

This science fair project investigates why the number of visible stars changes from place to place.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

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.

In this science fair project, students make their own rain gauge to measure rainfall.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.