My three-year-old son has somehow tapped into an innate knack for negotiation. We are driving home from an errand in the evening and from a quiet backseat he suddenly begins informing me of the plan for when we get home. We’re not going to take a nap. We are going to watch a movie with a snack and then put on jammies, he says. And he concludes by actually stating,"That’s my deal.” He can really only count to ten, but if I say two Oreos, he knows he can say four to try to get three.