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

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

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

Here's a fun science experiment that's refreshingly tasty too! Turn regular water into a tasty treat perfect for consuming on a hot day.

In this exciting and empowering challenge, your child will construct a bridge using marshmallows and toothpicks!

In this fun design challenge, your child will get creative with making structures out of toothpicks and gumdrop candies.

Make your own marshmallows and mix up some very interesting third grade chemistry lessons while you're at it!

This science fair project idea investigates how magnetism can defy the force of gravity.

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

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

This science fair project will help students learn about non-vascular plants, such as mosses.

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

Chemistry is a blast with this backyard bomb made from a sandwich bag. All you need are ingredients from the pantry to create a satisfying, and safe, explosion.

Help your second grader observe the phases of the moon, and then let the fun loose: he'll get to chart his observations with marshmallows!

This classic children's game demonstrates how sound travels through air vs. through a solid.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

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

This science fair project idea investigates how optical distances change the apparent size of an object as seen through a magnifying lens.

What is a compound microscope? Kids find out by making one of their own in this cool science fair project.

Kids will learn some cool stuff about chemical reactions by determining what happens when you mix different concentrations of hydrogen peroxide and yeast.

We all know that the Moon has different phases, but it can be hard to figure out why. Try this activity to see how the Moon's phases really work.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

In this project, the affect of acid rain is simulated by the acid, vinegar.

Explore aromas with your child and help boost her brain power with some fun and interactive science activities.

What causes dilated pupils? Young scientists will find out by applying what they already know about changes in pupil size and making models of the pupil.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

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 the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

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.