Based on a recommendation from a friend, I took the girls to a local marine park called Gulf World. We loved it! It is like a miniature Sea World. In addition to the exhibits, there were tons of shows. The first one we saw was the bird show, which included a trained bird flying in front of a wind machine:
Several months ago we read a book about ducks and the term "webbed feet" was used. I taught the girls what that meant and have not thought about it at all since. When we looked at these flamingos, the pool of water they were standing in was clear and shallow, so we could easily see their feet. Catherine screamed out "They have webbed feet, Mommy! Toe, webbing, toe, webbing, toe, webbing! It's a pattern!"