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

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

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

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

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

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

Test whether plants can grow without sunlight and water.

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.

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.

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

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

This science fair project idea investigates how color affects temperature.

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

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

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

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

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

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

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.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Ever wonder why refrigerator lights turn off when you close the door? Does the darkness prevent food from spoiling? This experiment, determines just that.

Set off an a science adventure as you prepare a row of bee homes for your new visitors.

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

Plants and light seem to be good buddies, but how far does the friendship really go?

There are many benefits to bugs and insects. This science project shows how cockroaches, termites, and other critters benefit our planet.

Learn about this simple machine and make a pulley of your own to use for fun science trials.

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

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

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