Can you bring a purse into science museum? At the train exhibit it says no bags or purses allowed.

Yes you can, not a problem. The only place we restrict bags or purses is at the Auschwitz exhibition

Yes

Science city yes. Specialty exhibits like Auschwitz etc no.

I have a purse that is carried like a backpack and had no problems getting in to Science City or the Planetarium. Park in the parking garage though it's cheaper than the lot in the front. :)

Yes you can. We didn't have any hindrance taking stuff inside.