Mentioned by TripSavvy
The 10 Best Attractions for Young Kids in Chicago
"The fish and other aquatic life at the Shedd Aquarium appeal to pretty much all ages from 1 to 100, especially the regular marine mammal shows in the Abbott Oceanarium. The centerpiece of the aquarium, the Caribbean Reef is a 90,000-gallon circular tank and filled with stingrays, sharks, eels, a sea turtle and an assortment of tropical fish. A diver hand feeds the fish and answers questions (while underwater!) several times a day."