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

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

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.

This science fair project idea investigates how the shape of an object affects drag.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Will storing cucumbers and tomatoes in the fridge destroy their unique flavors? Find out in this science fair project idea!

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

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

This science fair project examines how seeds hitchhike on animals and clothing.

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

Using a toy race car kids create a visual model of the Doppler Effect.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

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

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

This science fair project idea determines which method of hand cleansing is the most effective.

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

This science fair project idea investigates which objects float and sink in honey, water, and oil.

This science fair project teaches students the differences between fruits and vegetables.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

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

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

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

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

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

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?

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.