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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.

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

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

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

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

This project examines whether people's taste perception is influenced by what they see.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

In this project children practice the scientific method while playing with puffy paint.

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

This science experiment has students test whether a snail moves faster on concrete or dirt.

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

This fun experiment provides a concrete and visually striking illustration of photosynthesis.

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

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

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

Play with balance and simple engineering as you hurry to create a sturdy rock tower.

This science fair project idea explores how length affects the weight a bridge can hold.

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

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

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

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy 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.

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

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

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.

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.