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!

Study the life cycle of the common blowfly as it relates to forensic investigation. Record the first time you see flies, maggots, and eggs.

Is it a square or a circle? See if you can trick your friends with this zany science project!

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

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

In this activity, your child will be challenged to make a tower using paper cups.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

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.

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.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.

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

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

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

This science fair project idea explores how length affects the weight a bridge can hold.

Find out whether soil amendments can improve soil conditions and help you grow a bigger beanstalk in this ecology experiment!

How does water pressure change with depth? Kids learn how pressure works underwater with this cool and easy demo.

This science fair project idea investigates if webbed feet help a duck (and others) swim.

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

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

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

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

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

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

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

Using a toy race car kids create a visual model of the Doppler Effect.

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.