What causes sound? Here's a simple science experiment that adds a visual element to the science of sound to help kids better understand this tricky concept.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Make your own helicopter using a paper clip and a sheet of paper. Hold the spinner up in the air, let it go, and watch it spin gracefully to the ground.

Have you ever noticed the way a dropped stone makes a fun pattern in a pond or lake? What's the science behind these splashy occurrences?

This science fair project idea examines whether boys and girls differ in reflexes.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

This educated-guessing game is great for preschoolers. This activity helps your child work on her reasoning skills.

Take a dive into the candy jar with this yummy science experiment.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Your third grader will be amazed at the explosive combination of vinegar and baking soda in these chocolate volcano cupcakes with white chocolate "lava."

How sensitive is your skin? Here's a fourth grade science experiment that lets your child figure it out.

Introduce your second grader to the crazy world of static electricity with just a balloon and a sheet of paper.

Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

Children will learn why and how to compost as they help with the process of filling their compost, turning it, and observing the changes that occur.

Teach your child how to make an all-natural, yellow-brown dye, using just walnut shells and water. This deep dye can be used on textiles, art, and wood.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

What is topography? Kids find out by learning to make and read a topographic map in this awesome science fair project idea.