How good are humans at sound localization? Kids can try this cool science fair project idea to see how good their friends are at judging sound direction.

This science fair project idea investigates the difference in reaction times between boys and girls.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

Give your budding young observers a chance to discover simple machines at use in their own home.

Science fair project in which you will examine how crystals are formed by creating your own crystal using charcoal briquettes, salt, and ammonia.

Children combine an acid and an alkaline substance to simulate a volcano eruption in this fun experiment.

This science fair idea examines hydrogel superabsorbent polymer crystals. They can absorb 500 times their weight in water. Can they absorb other liquids too?

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

You've heard all about oil spills, but can they really be that bad? After all, vegetable oil is in almost every yummy baking good from cookies to brownies.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Make some easy homemade yogurt with your young scientist, and see what a few 'live' bacteria can do in the right conditions!

Children will learn all about cause and effect as they experiment with potion-making in this Halloween themed activity.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

Do different types of oil mix or stack? Find out in this science fair project idea!

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

Looking for a fun summer adventure? Learn what it was like to be a prospector during the California Gold Rush by panning for gold in a local creek.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

This science fair project idea produces sounds by creating vibrations using different objects.

In this experiment, you'll make a seafloor spreading model to learn more about how plate tectonics work and create mid-ocean ridges.

Get your fifth grader involved in some earth science by helping her plan and create her very own rock collection.

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

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Try this chemistry experiment with your curious kid and get some "shocking" results!

Examine the effect of pressure on carbonation in soda.

Discover whether cold or hot water from the faucet will boil faster on the stove.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.