In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This science fair project teaches students about wilting and browning of salad greens.

Are your taste buds up for the challenge? Put tongues to the test with this science fair project that examines who enjoys sour flavors more, adults or kids?

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.

Kids often ask, "how tall am I?" This science fair project seeks to determine how well kids can guess their own heights.

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

Science fair project idea that examines different physical characteristics of a chosen animal. Make educated guesses about evolution based on animal's form.

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

Stories change as you retell them. The objective of this science fair project is to demonstrate how information gets interpreted, distorted and changed.

Did you know a mouse eats almost fifty times as much as a cow? Find out how and test out the strange science with your friends!

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

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

With this cool floating rocks project, your child will get some hands-on experience with buoyancy and learn why certain rocks like pumice are able to float.

In this insulation experiment, you'll learn which clothes keep you warm in the cold, and which make you shiver.

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

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

In this experiment, your child will create two compost bins and see if he can determine what attracts fruit flies.

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

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Check out this fun science fair project idea for 1st grade: a solar eclipse model that demonstrates total, partial, and annular solar eclipses.

This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.