The Chicago History Museum (formerly known as the Chicago Historical Society) reopens this this weekend after an extensive renovation, and it's celebrating with free admission, performances by dance troupes, the Jesse White Tumblers and other acts, and more. This will be your first chance to see the first El train car, and Federated and Target just donated Norman Rockwell's painting of the Marshall Field's Clock to the museum, so you can see that too. Big crowds are expected, so you might want to make a reservation.