Spend your next in-service day in a coal mine, submarine, and tractor. Take the family to the Museum of Science and Industry, where there is something for children of any age. These MSI passes are good for 4 free general admission tickets and expire on November 30, 2013. They can be used for any combination of adult, senior or child tickets. Offer is not valid on Museum free days. Not valid for admission to Omnimax, U-505 on-board tour or other special exhibitions.