A scientific, but not overly technical, explanation of how lightning works
http://science.howstuffworks.com/lightning.htm
Answers to scientific questions about lightning
http://www.nssl.noaa.gov/primer/lightning/ltg_basics.html
An explanation of why most lightning storms occur in the summer
http://science.howstuffworks.com/question646.htm
Lots of lightning information including a history of the study of lightning, how to stay safe during a lightning storm, and even your odds of being personally struck by lightning during your lifetime.
http://www.lightningsafety.noaa.gov/overview.htm
Lightning safety and information for kids
http://www.lightningsafety.noaa.gov/kids.htm
More lightning information for kids
http://www.nationalgeographic.com/lightning/
