There was a window at the end of the hall in our apartment building where I grew up overlooking a main avenue. We would shoot paper-clips at buses, cars, pedestrians, trucks...anything was fair game. We'd bend out the clips and then cut them with a pair of side cutters. The drugstore owner on the corner became a little suspicious as to why a 9 year old boy(my teenage brother, cousins and neighborhood hooligans would always send me in)would buy 4 boxes of paper-clips in one day. I told him they were for a school project to which he replied, "In the middle of summer?...hmmmm". He sold them to me anyway, but from then on we went to the big grocery store a few blocks away as they didn't seem to notice or care. Never did get caught and the sport soon died off as the teenagers were discovering girls and they all thought it was dumb. Not before we'd graduated to bigger and better rubber-bands, however. And I can recall my brother fashioning a sling-shot out of a coat hanger and all of us oooing and ahhhing over the fact it would reach the building accross the street. He's a cad engineer today...ahhh what becomes of the criminal mind?