Where to go for a Psych trip?

I am in charge of my high school's Psychology club. For the school year of 2012-2013 I am interested in taking our club on a field trip. We would prefer some sort of museum or a interactive place. Asylums or places where students are currently being treated are out of the question. These raise confidentiality issues due to the fact that some students might be treated there. I need to a confirmed destination by the end of September 2012 so I can get it approved by the board of education. We need to be within eastern Pennsylvania, New Jersey, and southern New York. The ideal city would be New York City. Time is also constrained for us. We would be able to leave from our school by 8:00 and must return by 2:00 the same day. If needed we can go till 2:30 at the latest.