The whole family watched Jack put himself to sleep last night on the baby monitor. He seemed to be reviewing his day, drowsily chattering about cars and fire trucks and bicycles. He spent a few moments on the matter of Shoshi’s bike, which he pronounces with a nasally “Hngm-Hngm’s byckle.” Then he started singing. “Car, car, truck. Car, car, Mimi’s car. Car, car, dog.” We watched him until he dropped off into sleep, and shared a hanging sadness that was not disappointment when his song stopped.