Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

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

This science fair project idea determines if the color of light affects the growth of plants.

This project examines the amount of saltwater required to affect the growth of plants and subsequent effects on growth and development.

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.

Science fair project that demonstrates how stalagmites and stalactites are formed.

Explore this fun middle school science fair idea to learn about photosynthesis and the key role of light in the growth of green plants.

Find out whether packaged seeds actually do expire in this new science fair project idea.

How does light affect plant growth? Do different colors of light work better than others? Find out in this classic science fair project idea.

This science fair project teaches kids experimental design and how to test if subjects can really sense if they are being watched.

This science fair project idea determines which flower lasts the longest.

Find out whether putting something on top of a plant will inhibit its growth.

This experiment will evaluate if chewing gum affects students' test performance.

How well can people recall what they have observed. Test your knowledge in this fun experiment.

Investigate how to keep your fruit fresh for longer. The purpose of this science experiment it to determine which kind of bag best preserves fruit.

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

This project is a vivid, concrete introduction to the basic but important idea that plants need sunlight and water to grow.

In this science fair project, students examine how the flow rate in a stream affects the growth of aquatic plants.

This science fair project idea demonstrates how our fingers prune when in water.

What happens when "coffee-addicts" miss coffee for 1 day? Find out in this science fair project idea!

This experiment investigates whether the Ranschburg Effect is observed more frequently in older or younger adults.

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

This science fair project idea investigates how color affects temperature.

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

Assess physical and mental states of subject before and after drinking coffee. Compare initial expectations with their reported conditions.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

The goal of this middle school science fair project is to examine the effect of caffeine on plant growth.

Discover which method for odor removal words the best for stifling refrigerator odors.

This science fair project examines how carnivorous plants digest insects, and whether the plant can use nitrogen in the soil to compensate for lack of insects.

This science fair project idea examines reptile behavior and to determine whether reptiles are more active during warmer temperatures.