•  What is Static Electricity?
http://www.sciencemadesimple.com/static.html
Uses atomic structure to explain static electricity (with illustrations --- easier than it sounds!), shows common ways to get static electricity, and has directions for related projects.

•  How Stuff Works -- Electronics & Home Appliances
http://www.howstuffworks.com
Explanations of how everyday electronic things works with lots of clear illustrations and photos.