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

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

Science fair project in which you will create your electricity by making a homemade battery using salt water, a nail, and a copper wire.

This project explores differences in people's reactions to images in color and images in black and white.

Examine whether males or females are more likely to have a higher center of gravity.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

The objective of this experiment is to find out if cooked beans grow faster, if at all, than uncooked beans.

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

This science fair project idea quantifies exactly how accurate the cricket thermometer is.

The purpose of this science fair project is to demonstrate how yeast, a fungus, causes bread to rise.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

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

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

This fun elementary school science fair project idea helps students in designing an amusement park using their knowledge of forces and simple machines.

In this cool experiment, learn about the forces of resistance in a liquid and race marbles in a cylinder to find out which fluids have a high viscosity.

Show your preschooler how to make a print of a butterfly using her hand as a tool--a great way to stimulate her sense of touch.

This experiment strives to determine if tracking of conservation habits will lead to reductions in a family's electricity and water bills.

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.

This science fair project teaches you about what makes persimmons so tart and how astringency can be removed by studying the effect of tannins on fruit.

This science fair project evaluates which sense produces the fastest response time: hearing, touching, smelling or seeing.

Construct and experiment with a periscope using reflected light rays to gather an image.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

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.

Science fair project that examines how winter storms form and the relationship between temperature, moisture and snow.

In this project students learn about the golden ratio and investigate if it can be used to predict people's assessment of beauty in others.

This project compares test subjects' responses to whining and other "attachment" and attention-getting sounds to determine which sounds are most distracting.

This science fair project idea explores if an LED light can be powered by vegetables and/or fruits.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Check out this cool science fair project idea to explore the risk of mechanical deterioration of artifacts placed in a storage box due to mold outbreaks.