We talked about burns and cuts and how they heal differently. Talking about burns led to talking about sunburns. Which led to talking about hair, and whether he'd keep his when he got older (Look at your Uncle Zach, I said: you don't have anything to worry about). This led to talk of mustaches and what age a boy usually has to start shaving.
Daniel is trying to imagine me as his or James's age. I assure him I was, indeed, once. Eventually, having absorbed all he could from our wide-ranging talk, he just said, "Yeah, yeah, yeah," and got a book to read. Then he curled up on my lap and we read, Vinny the Armadillo is Afraid of the Dark. James came and joined us for the end, fresh from his nap.
Important stuff. Good times.