Museum of Science in Milan (Leonardo da Vinci): http://www.museoscienza.org/english/leonardo/
Smithsonian: http://www.si.edu/
FOSS: http://www.fossweb.com/
NASA: http://www.nasa.gov/home/index.html
Exploratorium: http://www.exploratorium.edu/explore/handson.html
Science with me!: http://www.sciencewithme.com/
Bill Nye: http://www.billnye.com
National Geographic Kids: http://kids.nationalgeographic.com/
Science Netlinks: http://www.sciencenetlinks.com/index.cfm
Pacific Science Center: http://pacificsciencecenter.org/
