http://www.scholastic.com/teachers/article/40-cool-science-experiments-web
Inventions Project:
http://www.enchantedlearning.com/inventors/
http://www.indianchild.com/inventions.htm
http://inventors.about.com/od/astartinventions/a/FamousInvention.htm
http://www.ideafinder.com/history/of_inventions.htm