Lucy: Mama! You can’t give Rowan milk! It hurts his tummy!
Me: I know, but this is special milk. I got it just for Rowan. See, regular milk has “lactose” in it, and that’s the stuf that hurts Rowan’s tummy. But this is lactose free.
Lucy: Oh. (long pause) Can Rowan have brown toast?
Me: ….Not black toast, LACTOSE.