Let me tell you that the children in my charge for an average of twenty-five hours a week are not likely to lose their keen edge during the forty-five hours they spend with their parents. They aren’t moving hand-carved animals on and off a Noah’s Ark, believe me. They are spying on real grownups all the time, learning what they fight about, what they’re greedy for, how they satisfy their greed, why and how they lie, what makes them go crazy, the different ways they go crazy, and so on.