What animals are most popular? This project affords practice in data-collection, record-keeping and data-analysis through the investigation of this question.

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

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

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

In this project children practice the scientific method while playing with puffy paint.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

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

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

This science project teaches young students about germs, bacteria, and the importance of washing their hands. Students will test what is the best way to wash.

In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.

This science fair project idea investigates which objects float and sink in honey, water, and oil.

Start your toy engines -- this is going to be a fast and friction-filled race!

In this science fair experiment, children demonstrate the relationship between the amount of stuff and the amount of pressure in a closed system.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Science fair project that examines condensation and the conditions needed in order for dew to form.

This science experiment has students test whether a snail moves faster on concrete or dirt.

This science fair project will help students learn about non-vascular plants, such as mosses.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Can a horse lead itself to the carrot? Train your horse with carrots and boxes and test horse memory in this fun zoology science fair project.

Do different types of oil mix or stack? Find out in this science fair project idea!

This project examines whether people's taste perception is influenced by what they see.