We were having a scientific conversation, the two-year-old and I. A Saturn in front of us led to a listing of the planets and questions like Is the moon a planet? Which led to talk of stars, of course, because you can't talk about the sky without talking about stars. This was when she made an important correlation: That's like Elmo's Mother Goose when he sings "Twinkle, twinkle little star..." Which was my reminder that she is still, in fact, two. And I like her.