Physics for Kids
http://www.physics4kids.com/
This site explains basic physics concepts in a fun and interactive way. Concepts such as motion, heat and thermodynamics, electricity and magnetism, light, and modern physics are clearly explained and illustrated. Students can then test their knowledge of each topic with a 10 question quiz. Physics for kids is part of a network of high-quality educational Web sites including Chem4Kids, Geography4Kids, Biology4Kids, Cosmos4Kids, and NumberNut.com.