In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

This slightly messy, but tons-of-fun tactile activity will cement the idea of the land and water as pictured on maps in your young learner's mind.

This kinesthetic learning activity will help your fourth grader get a firm grasp on the immensity of the solar system.

Here is a hands-on activity to help third graders understand the four points of a compass...and how we use them to get around.

This activity will help your child review science concepts, learn new ones, and become familiar with examples of various concepts in science. Plus, it's fun!

Do this experiment to help your first grader understand how salt can be removed from salt water. All it takes are a few household materials.

Teach your fifth grader about the wonders of wind by making and observing this winter wind chime.

Show your child how to construct a homemade thermometer. It's hands-on fun and a great way to learn about this important instrument!

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

Show your preschooler how to construct this very special planter for Mom. It makes a great pick-me-up, and it's easy for kids to make in a flash!

How much water comes out of snow? Explore this timely question with your kindergarten scientist with this easy winter experiment.

Here's a guide to starting a community clean-up project from scratch.