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

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

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

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

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

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

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

What is a wedge? Kids find out by experimenting with different wedges in this simple science fair project idea.

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

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.

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

How does dishwashing liquid work? Kids discover the chemical mechanism behind cleansing power in this easy science fair project idea.

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.

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?

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.

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

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!

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.

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

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

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

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

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

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.