What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

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

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Try this simple activity with your child to guesstimate the age of a tree in your yard and nurture her developing math skills while you're at it!

In this science fair project, students make their own rain gauge to measure rainfall.

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

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

Do plants breathe? Not exactly. They do respire though! This activity will help your child with see that plants are producing the oxygen we need to survive.

Grow borax crystals and get your child excited about Earth science with this crafty science experiment.

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.

Some fossils have been been preserved for billions of years! Help your kid understand how fossils are created and preserved with this crafty project.