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

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

Science fair project which evaluates different athletic shoes in order to find out whether any of them affect a person's ability to run.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

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

In this Bernoulli's Principle experiment, you'll learn how an increase in the speed of a fluid, like air, decreases pressure.

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.

In this experiment, students will discover how heat and pressure turn clay into slate, phyllite, and finally schist.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this science experiment, do tensile strength test on fishing line, a strand of hair, a rubber band, and any other materials you're curious about!

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

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

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

In this cool physics experiment, use double plane mirrors at various angles to learn about light reflection. Then, see if you can solve a puzzling problem!

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.

What are the effects of colored light on plant growth? Explore plant behavior in this cool botany science fair project and learn about phototropism!

Young physicists will wrestle with a discrepant event: the Hammer Ruler Trick. They'll make some inferences about torque, balance, and center of gravity.

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!

This science fair project idea explores whether talking to a plant will help it grow.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

The goal of this science fair project is to demonstrate different ways to generate static electricity and record its effects.

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.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Kids conduct a cool balloon rocket experiment in this fun science fair project idea. Does a greater volume of air mean a greater distance traveled?

Wonder why bugs always fly around your lights at night? This experiment determines whether insects are attracted to the heat or the light.