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In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Science fair project that determines the correlation between the ability of selected materials to conduct heat and a material's density.

Start your toy engines -- this is going to be a fast and friction-filled race!

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Science fair project in which you will stage an election campaign to determine whether people are more swayed by a positive ad or negative ad.

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

Uh-oh! Is that a pill sitting on the counter or a piece of candy?

Science fair project that teaches you key definitions of molecular science, and how different isotopes of an element affect the relative atomic mass.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

In this science fair project, we learn how air molecules move as a result of density, convection, and air currents.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Here's an easy experiment that lets your first grader practice the scientific method, while watching a caterpillar eat.

Boiling water in a paper cup is possible because of convection and the thermal properties of water and paper. Learn how with this fun science fair project idea.

By dropping a magnet through a copper tube, kids observe the cool (and bizarre) braking effect produced by the eddy currents predicted by Lenz's law.

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

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

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.

Check out this cool science project idea to explore the differences in feeding behaviors of birds and if other species of birds also have color preferences.

In this fun science fair project idea learn about the multiple sources of radio waves and fin out how difficult it is to block them.

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

Science fair project idea examines what is remembered from high school education. Formulate and administer high school curriculum tests to adults over 21.

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

Create a double-slit interference out of cardboard. Produce an interference pattern that demonstrates the wave and particle characteristics of light.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea explores what it takes to create a biosphere, or a self-sustaining ecosystem.

Can cells be frozen? This science fair project provides information to answer this question.

Would your dog prefer homemade or store-bought food? Raw or cooked? Test your dog's preferred diet in this fun experiment.