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This science fair project idea compares whether ionic dryers leave hair in better condition than non-ionic dryers.

Demonstrate that insects observe colors and choose favorites. Place colored pieces of construction paper on a flat, glassy surface, observe bug preference.

Discover whether eating certain foods will make you smell (not only bad breath) but through skin cells.

Find out the differences (if any) in the frequencies of voices produced from a computer, from a phone, and directly coming out of the voice box of a human.

Explore the effect of wind speed on the burning rate of a candle.

Demonstrate Newton's laws of motion by examining the relationship between mass, force, and acceleration during free-fall.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

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

Science fair project that uses iodine solution to demonstrate how starch is turned into sugar when it is chewed in the mouth.

How powerful is the reaction between baking soda and vinegar? Find out here!

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

This awesome diffraction grating experiment puts high school students' applied math skills to the test by having them calculate the wavelength of laser light.

In this science fair project, students investigate how different colors influence appetite.

In this science fair experiment, middle school students evaluate whether tone of voice can influence our ability to remember a list of everyday objects.

This experiment will evaluate if the environments that people work in affect their speed and accuracy in performing mental tasks.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

In this science fair project, kids measure how weather conditions affect how fast a puddle evaporates.

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

Air invisible; it doesn't make sounds; you can't pick it up and throw it. So how do we know it exists? Help your second grade scientist figure it out.

Test ability to distinguish between natural and artificial aromatherapy oils. Select fragrance, natural and synthetic sample. Volunteers state preference.

Create a colorful, informative display that illustrates the properties of blood cells. Prepare slides using samples of fresh raw beef or chicken bone marrow.

This experiment will explore if magnetism has any effect on the regeneration abilities of flatworms.

Describe the lives of commercially raised chickens. Contact local chicken farmers for information and advice. Write a detailed report about farming techniques.

This science fair project idea explores discover whether mixing solutions of equal distances from neutral pH (7) will create a solution close to pH 7.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

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