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

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

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.

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

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

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

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

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

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

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.

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

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

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

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

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

Find out whether we can create motion in a dish and as a result, create a wonderful and colorful show.

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

People have favorite flavors, but what about ants? Which ant food is the most popular?

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Can you dig it? This science experiment isn't for kids who like to keep their hands clean.

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

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

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.

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

It's rhyme time! With this science fair project idea, your child will find out which words can be considered easy rhyming words, and why.

This science fair project idea demonstrates that plants give off water.

This science fair project teaches students the differences between fruits and vegetables.

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.

Be a chemist for a day and study the simple reaction between sugar and heat. Try heating sugar and see what happens!