The History of Invention
http://www.cbc.ca/kids/general/the-lab/history-of-invention/default.html
About: Famous Inventions
http://inventors.about.com/library/b1/b112.htm
Museum of Anciet Inventions
http://www.smith.edu/hsc/museum/ancient_inventions/home.htm
IdeaFinder
http://www.ideafinder.com/history/of_inventions.htm
Smithsonian Institute
http://www.si.edu/resource/faq/nmah/invent.htm
How Stuff Works
www.howstuffworks.com
History of Inventions and Discoveries
www.historyworld.net/wrldhis/PlainTextHistories.asp?historyid=ab23