Is there anything to do in Chicago during the Winter?

I'm going to Chicago this Saturday, only for about 6 hours, because I'm taking the EL from O'hare, to downtown, and then back to O'hare for my connection flight. I know that there is a thread for this but I'm not sure if that can relate for the harsh winters in Chicago may change this. Does anyone have any ideas to what I can do in this small time frame? I know for a fact, that I will go out for some Deep-Dish Pizza, but I don't know the best location. Please post comments here before 3/13/10.

Sorry [ Click here to register ]