I will soon be 69 and I haven't traveled alone to a city since being a widow, but I really want to bring my grandson to see "Sue" the dino (his favorite thing) As well as all other 5 yr old boy stuff. Will fly in or possibly drive to St. Louis and catch the train there. Due to arthritis, I have to "save" my feet for exhibits, zoo, whatever the navy pier is.........and what else? What's a safe, reasonable hotel where we can hop on transportation nearby and get to all the kids' sites? A fun environment with lots to see and do and places to eat would be great for him. Any help?