Tour guide

A knows most of the animals in the zoo. He knows what they are and what the little placard says and anything else we've talked about. So now when we go to the zoo, he plays tour guide.

Example: Yesterday we were walking through Elephant Odyssey's bug section when someone said, "What is that?" And A stopped to say:

Those are diving beetles. They swim down, down, down here to get some food and then they swim up and get air. Then they swim down to get food, and up to get air, and down, and up.

[This is all him narrating while pointing at a particular beetle who was kindly illustrating his points.]