You rarely see kids in Back Bay, except maybe in a park with parents, visiting. You see babies sometimes, toddlers, little ones in strollers, but not school-age children hanging out with friends or playing alone. It's an expensive neighborhood and the local grade schools are bad unless you can afford private school (that flag on the building at left is on a Montessori school). I've seen the kid whose legs sprawl out of the doorway above before in the same spot with another child, so maybe he lives there, or at least is a regular visitor. He was sitting on the steps turning over a rubber ball in his hands, waiting.