Here's the scoop. Loved the Museum of SI when we visited 8 years years ago, but never been to the Shedd Aquariun. Our girls are 10, 13 and 17. We are getting a one day Chicago Go card and have other things planned for the rest of the day (bus tour, boat ride, navy pier, John Hancock, etc..). Which would you recommend? We were planning on spending 3-4 hours there at one of these two attractions.