Our DS 15 months old and has been to 3 different zoo's already. His first time was around 3 months old and he slept most of the visit. Second time he was around 7 months old patted a guinea pig and a lizard. Our most recent visit was when we were in America in June, DS was 13 months old, he loved riding the train through the zoo and he definately was looking at everything around him. He liked going into the indoor snake and fish exhibit. We also took him to a petting zoo on that trip and he layed on the ground next to some very friendly goats and enjoyed patting them. It was lovely to see him having such a good time.

I think your DD will love the experience. Have a great time!