In the garden of Dee’s Tots Childcare, amid the sunflowers, cornstalks, and plastic cars, a three-year-old girl with beads in her braids and a two-year-old blond boy are shimmying. These are Deloris Hogan’s 6:45 p.m. pick-ups. Nearby, also dancing, are four kids who won’t be picked up until late at night, as well as two “overnight babies,” as Deloris calls them. Dee’s Tots stays open 24 hours a day, seven days a week; the children’s parents work unconventional hours, producing an unexpected cycle of drop-offs and reunions. One afternoon in August, the kids bounce on the center’s inflatable castles, rustle around at the sand tables, and eat a watermelon snack. Then it gets dark.