(About to walk out the door...)Me: Oh, I need to grab the checkbook.
Calvin: Why do you need the checkbook?
Me: So I can pay for your books.
Calvin: Oh, right! My chemistry books!
Me: ...No...You won't be learning chemistry in kindergarten.
Calvin: (pause) Oh. But the checkbook is for my math and science books, right?
Me: (I got nothing.)
Calvin: Do you know what my favorite thing is to learn?
Me: What?
Calvin: Math! And Chemistry! I just wish someone would teach me about chemistry...
Uh-oh.
