This science fair project idea demonstrates that plants give off water.

Is it magic? No...it's the amazing, gravity-defying capillary action experiment! Kids will love this dramatic and enlightening science fair project.

How powerful is the reaction between baking soda and vinegar? Find out here!

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This science fair project teaches students about wilting and browning of salad greens.

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

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

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

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

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

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Test whether plants can grow without sunlight and water.

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

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!

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

This science fair project idea explores the egg's thin membrane.

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

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

This project compares the strength of one, two, and three-ply toilet paper.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

In this science fair project, students create their own miniature salt flats at home.

This is a fantastic and easy science experiment where kids will learn about elasticity by testing how high bouncy balls of different materials can bounce.

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea determines which method of hand cleansing is the most effective.