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.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

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.

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

Kids explore how a single movable pulley can confer a mechanical advantage over a fixed pulley in this cool engineering science fair project for 2nd grade.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

Develop your child's mathematical and engineering skills with this fun building brick challenge. In this activity, your learner will be challenged to create a boat out of building bricks.

In this activity, children will work on their mathematics and engineering skills as they attempt to recreate the Eiffel Tower out of building blocks!

This science fair project idea explores how the shape of a boat affects its density and how much weight it can float.

What does a raindrop look like when it splashes on the ground? Is each raindrop unique like snowflakes? Find out how raindrop size varies in this experiment.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

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.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

This science fair project idea examines liquids of different densities.

This science fair project teaches about mold. Students will test different foods to see which grow mold the fastest.

This weather spinner will improve observation skills by encouraging children to examine and track weather details and patterns.

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

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

This easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

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

This science fair experiment idea's objective is to understand the general concept of an acid and a base.

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

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

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

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.