In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

Science fair project that measures the relative times it takes a plastic bag and a biodegradable plastic bag to decompose.

Examine which metal conducts more heat by boiling water in 3 pans made of aluminum, copper, and stainless steel.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

This science fair project idea examines if there is a reason that musical notes are at the pitches they are.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

Certain fruits can change gelatinâs ability to set. In this experiment, kids will discover what happens when gelatin meets pineapple enzyme.

This science fair project idea explores the fastest average speed a human can talk.

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

This science fair project idea explores if male or female humans are more likely to exhibit some form of color blindness.

Learn about the field of psychophysics and to learn about "Just Noticeable Differences."

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

This science fair project idea explores what common compounds can be easily separated out in a centrifuge.

Your mission, if you choose to accept it, is to construct a parachute that will deliver an egg safely to the ground. Good luck!

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

In this science experiment, test the pH of soil surrounding a gas station to determine if gas stations have a negative effect on the environment.

This experiment uses a voice recorder to monitor the progression of a message in the telephone game as it deviates from the original.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

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.

Check out this cool science fair project idea to explore non-chemical means of preserving fruits by using thermotherapy.

While your cells are much too small to see without a microscope, you can create the look of a cell in your very own home with just an egg and vinegar!

Discover whether cheap saline solution bottle cleans and disinfects just as well as more expensive kinds formulated with different ingredients.

Science fair project which will teach you more about the foods that you eat, and learn which ones are healthier choices.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

Science fair project that examines how cell membranes allow the inward and outward flow of materials as demonstrated by eggs.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.