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

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

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

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

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.

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.

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

Why doesn't the ocean freeze? Students answer this question by simulating the chemical composition and temperature of arctic waters in their own home.

Can you imagine a sky filled with bright, colorful bubbles? Make this whimsical scene come alive with bubble science!

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

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

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

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

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

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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

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

In this fun science experiment, kids will determine the best method for ripening avocados and discover the cool chemical reaction that makes this possible.

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!

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.

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

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

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

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Test your friends to find out if you can replicate the placebo effect's incredible results.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

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

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.