Three-year-olds aren’t interested in the chemistry of digestion; they’ve simply hit on the magic word that always provokes a response. But Kevin had a real why phase. He thought my wallpaper an incomprehensible waste of time, as just about everything adults did also struck him as absurd. It didn’t simply perplex him but enraged him, and so far Kevin’s why phase has proved not a passing developmental stage but a permanent condition.
