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

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

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

In this design challenge, your child will make a bottle rocket using typical household items.

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

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 explores how length affects the weight a bridge can hold.

This science fair project idea explores alcoholic fermentation at work by making your own soda.

This basketball project explores the best way to make the perfect shot every time.

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

Demonstrate how to tell the age of an egg without having to crack it open.

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Is it a square or a circle? See if you can trick your friends with this zany science project!

In this fun activity, your child will create their very own solar oven to bake s'mores!

Kids conduct a simple birdseed experiment to figure out what kinds of birds live nearby in this fun science activity.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

Science fair project that determines whether lettuce that is harvested gradually yields more produce than lettuce that is harvested all at once.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

This science fair project idea explores whether cats can be trained in the same way that dogs can.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

In this activity, your child will be asked to create a boat that can successfully float while holding 25 pennies.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

In this activity, your child will be challenged to create a device that protects an egg when it is dropped from a height of about 10 feet.

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!

Find out which type of sponge holds the most water.

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!