We played jacks at the edge of the ballfield in the playground at the corner of W.115th Street and Belmont. As I rember it, we only played jacks after we had a vigorous workout on the handlebars, the swings and teeter totters and while we were having a carton of cold chocolate milk which was deliverd to the playground every day in the summer. This may have been just after WWII. I was never really very good at jacks, but my Sister Nancy was the expert. Recognizing her superiority, I usually gave up before the game was even over….