Since they built the Science Center I have been there countless times. They have changed exhibits around, the planetarium (which is connected) has been remodeled and they built a new dome which has good exhibits. I really enjoy the Omnimax theater. The movies are always really good. we saw an interesting titanic exhibit last year. again, you can park for free on the street somewhere or in forest park. lots of hands on stuff. we never get enough time in one day to look at everything.
Pros: variety, cheap, interesting
more