For Uncle Zach

While reading a Curious George book today Liam was introduced to the word mammal. I did my best to explain what a mammal is:

M: A mammal is any living creature that has hair....so are you a mammal?
L: Yes!
M: How about me and baby Caroline?
L: Yes, and Daddy too!
     But not Uncle Zach.
M: (laughing) Well, Uncle Zach may not have hair on his head but he does have hair on his arms and legs. Just like you and me. One more important fact about mammals are that they need air to breathe.

I probably should have led with the breathing air part first.