Next time you head outside for a hike or a camping trip, bring along this checklist of animal tracks!

Where'd that shadow come from? Next time a scary shadow crosses your path, you'll know just what to look for.

Teach your little scientist the difference between physical and chemical changes, on a molecular level.

Learn all about light refraction by simply placing your pencil in a glass of water. Warning: your pencil may not be quiet the same afterward.

Discover some of the fascinating properties of gravity by studying one of Newton's famous laws, the Law of Gravitation.

Here's a great introduction to five famous astronomers for kids. See who got the star party started with this worksheet.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

How do you think our universe will end? With this worksheet, explore some of the common theories, and then come up with some of your own!

Learn about drag, air resistance, and Newton's laws with this cool worksheet on bobsled physics!