I've been to the Field Museum twice, back when I was married to Randy and you're right, it's just wonderful. While we're in Chicago, we'll see the Shedd Aquarium, the Museum of Science and Industry, and the Zoo if we have time. I'm not sure how much more we can work in but if anyone has suggestions, I'd take them. Dad said there's a cool boat tour he'd recommend, but I haven't looked it up yet.