Discover whether the â5-second ruleâ is effective at determining whether food is still safe to eat after being dropped on the ground.

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

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

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

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

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

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

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

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 objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project idea investigates how color affects temperature.

This science fair project idea investigates whether plants can survive being frozen.

This science project allows students to study the psychology of happiness.

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

This science fair project idea explores whether people have an innate feel for the passing of time from a few seconds to 20 minutes.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

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

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

This science fair project idea determines if the temperature of rubber effects how high it bounces.

What can you do with hair after its cut? This science project teaches you practical uses for human hair.

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

Demonstrate how to tell the age of an egg without having to crack it open.

In this fun experiment, we'll find out how color affects heat absorption!

Determine whether butterflies like to drink sugar water, salt water, or plain water.

This science fair project idea determines the most effective method of preserving food.

This science research project challenges students to think of more effective lobster farming methods.

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

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.