From her stoop in the center of a sophisticated city, my niece Erin has carved out a delightful little corner of Mayberry. She and her neighborhood gang enjoy a living-room-forts, frontyard-warter-balloon-fight, Saturday-sleepover, come-home-when-the-streetlights-turn-on kind of childhood, while all around them Chicago hums. They each have the necessary kind of scheduled activities that keep their parents [...]