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Learn about magnifying glasses, concave lenses and inverted images by sending rays of light through a magnifying glass in this cool science fair project!

This fun science fair project idea helps students learn how acid rains are formed and explore how acid rain damages the environment.

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

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!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

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

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

What is condensation? Little mad scientists will learn about condensation, states of matter, and air pressure by conducting this cool science experiment.

Give your local birds a treat — and your young birdwatcher some fun — with this simple DIY bird feeder.

Do you think heat can affect a plant's growth rate?

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Combine your child's natural curiosity with his developing classification and writing skills by helping him create a backyard field guide.

In this simple circular motion experiment, you'll observe tangential velocity and learn about how acceleration and centripetal force affect an object.

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

Why do ants like sugar? Do ants like artificial sweeteners too? Kids find out with this great inquiry-based science fair project.

Wiggly worms are known for staying buried in the soil, but how does that affect plants? Are earthworms and plant growth related?

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

Why does honey crystallize? This science fair project project answers this question and identifies the variable that makes this sweet solute crystallize faster.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Kids will learn about insulation, heat conduction, and the economic benefits of energy efficient windows in this cool science fair project.