I grew up in East New York, Brooklyn in the ’80s. We had the game spot near the end of our block. The garage, or the factory across the street from it, was the backstop for baseball. Flies up was played on the garage, and in the street was the skelly board. We used to use the plastic caps fro $.25 juices. We’d fill the top with wax from a 7 day candle and coat the bottom with wax to get the glide. I haven’t seen anyone play skelly in age. Kids don’t play outside anymore.