You may have to click on the picture to make it larger in order to see what I'm talking about.
The other day Jane was out using the sidewalk chalk with her friends. She made this adorable bird and when she was done I said, "Look, it's got two feet, it's got a beak, it's got a wing, and a tail." Jane said, "That's not a tail, it's the bum." "Do birds have bums," I asked?
"Yeah, mom, their poop has to come from somewhere." My daughter is very smart. Now every bird she draws has a very large, protruding bum. They're awesome.