Even children are busy now, scheduled down to the half-hour with classes and extracurricular activities. They come home at the end of the day as tired as grown-ups. I was a member of the latchkey generation and had three hours of totally unstructured, largely unsupervised time every afternoon, time I used to do everything from surfing the World Book Encyclopedia to making animated films to getting together with friends in the woods to chuck dirt clods directly into one another’s eyes, all of which provided me with important skills and insights that remain valuable to this day. Those free hours became the model for how I wanted to live the rest of my life.