Ok my freinds and I wanna go to chicago for 4 days this summer. What are some must dos? We know we want to go on the rides at navy peir, John G. Shedd Aquarium, Union station (were er fans), A zoo (which one is best) and willis tower. We would also like to tour a firehouse if possible anyone know how to do this? Also can you buy fire/police patches anywere? I collect them. were planning on staying in another city and taking the train into chicago. Also we want to go to six flags. Any good discounts out there?