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.

This project compares the strength of one, two, and three-ply toilet paper.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Find out whether a longer airplane will fly farther or a wider paper airplane.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

How do organic materials become soil? This science experiment measures what materials biodegrade.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

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

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

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.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

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

This science fair project idea explores whether the process used to dry the beans we eat for food renders them unviable.

This project determines what category of person is most likely to be ticklish.

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

This science fair project idea investigates how color affects temperature.

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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

Test whether plants can grow without sunlight and water.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

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

This science fair project idea investigates how the height at which a pendulum is released affects the length of time it continues.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.