This science fair project idea explores whether boiling and freezing water will have an effect on how much it weighs.

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

This project compares the strength of one, two, and three-ply toilet paper.

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.

Is it solid or liquid? Create oobleck and witness the amazingly weird oscillation between the two!

In this science fair project, young children discover what happens when two fluids that have different densities get together.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

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

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

In this Halloween-themed activity, young learners will find out what happens when they mix two household items together to create a surprising chemical reaction.

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

This science fair project idea investigates whether plants can survive being frozen.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

Discover which fabrics shrink the most in the wash and why.

This science fair project idea explores whether mint, known for its âcooling sensationâ really does lower temperatures.

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Cherries usually burst with flavor, but in this science experiment they burst with osmotic pressure. This science activity will blow your curious kid's mind!

Make a seed bomb and let your junior guerilla gardener spread flowers far and wide.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

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.

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

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Kids will make predictions about cricket behavior by conducting this fun and easy experiment which simulates different environments for crickets.