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Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!

The purpose of this science project is to determine which stimulus, gravity or water, will cause the greatest growth response in a plant.

With Halloween right around the corner, find a way to use your brain and reward your tummy with a new type of science -- candy science!

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

Determine the maximum distance traveled by projectiles launched at an angle. Use some cool math to figure out at which angle your projectile will go farthest.

In this science fair project on the relationship between distance and time, kids explore the behavior of gravitational acceleration through direct observation.

Free science fair project idea that examines cheating in school-age children. Project involves a task in which children are tested on various tasks.

Experiment about connection of senses of taste and smell. Using blindfold and noseplugs, administer blind taste test. Analyze results and organize data.

This science fair project idea examines how well individuals can remember a story they were told and how accurately they pass that story along.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.

Young physicists learn about apparent weightlessnessâthat weird sensation you sometimes feel in elevators, turbulent airplanes, and roller coasters.

Do people only "hear" what they want to hear? Explore pareidolia and psychoacoustics with this easy science fair project that pits melody against white noise.

This project examines various algorithms to determine the ideal algorithm for a strategy game.

The objective of this science fair project it to determine whether adding ethanol alcohol to gasoline slows the run time of a motor.

Research what is known about Alzheimer's disease and its treatment, and then prepare a script for television to educate the public.

Science fair project that determines whether brain size is correlated with intelligence.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

Kids will explore the corrosiveness of soda in this cool science fair project by leaving pennies submerged in soda overnight.

Boiling water in a paper cup is possible because of convection and the thermal properties of water and paper. Learn how with this fun science fair project idea.

Check out this fun science fair project idea to learn about seismic waves and how fast they travel during an earthquake.

This science fair project compares the allelopathic chemical produced by the Black Walnut tree to a commercial herbicide in stopping the growth of a shrub.

The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.

This project examines the affect of temperature on viscosity and surface tension of different liquids.

In this fun project, use a memory game to test various age groups and determine whether aging directly affects short-term memory loss.

Which type of sunglass lenses gives you the best protection from the sun's harmful UV rays? Find out in this cool science project!

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Discover the force of water! This article provides step-by-step instructions for creating your own science experiment.