This science experiment tests whether warm or cold water works best in making cut flowers last longer.

Test your friends to find out if you can replicate the placebo effect's incredible results.

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

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

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

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

In this experiment you will replicate the mummification process by making a hot dog mummy.

Plants and light seem to be good buddies, but how far does the friendship really go?

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

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

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

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

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Start your toy engines -- this is going to be a fast and friction-filled race!

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

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

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

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

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

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 idea explores how length affects the weight a bridge can hold.

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science fair project idea determines if the size of the parachute will change the rate at which an object falls.

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.