Almost every year, my school would take our class to the San Francisco Exploratorium. If you haven't been there about a bilion times, it's really fun. The main highlight of the museum (they even have a commercial for it) is the cow's eye dissection (everybody's so engrossed with the eye, they don't llisten to the person who's describing what he's doing and why he's doing what he's doing). It's pretty hideous- last year a boy even fainted. They have some pretty fun displays (I love the hands on projects the best).
more