This cool science fair project teaches kids about temperature, density and buoyancy using balloons that float with normal air. No helium required!

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

Climates with more snowfall have more coniferous forests and fewer deciduous ? Learn about how pine trees in a coniferous forest adapted to withstand snow.

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

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.

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.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!

This project investigates the affect of storage temperature on microwave popcorn.

Science fair project that develops latent fingerprints on a non-porous objects by converting superglue from a solid state to a gaseous state.

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

This science fair project idea's objective is to understand the concept of air pollution and examine the quality of air in our environments.

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

Will increasing the amount of salt in water effect how slow or fast the water freezes?

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

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

This science project explores the concept of being opaque or clear. Can you make something clear opaque? Or something opaque clear?

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

What keeps a an item cooler, polymer crystals or ice? Find out in this cool science experiment!

This science fair project idea examines which type of insulation holds in the most heat.

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

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.

This science fair project idea creates cool new colorful fabric pattern designs and experiments with the mixing of colors.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This science fair project idea investigates if fats add to the flavor of food.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

In this investigation, an oil spill is simulated in a jar to observe the damage that oil spills have on the ocean and ocean life.