Rather than a key chain, I used to use my house key to play hopscotch with. It was just the right size and weight and, conveniently, was hooked onto a lanyard hanging around my neck (high fashion in the 60s). I’d just unhook the key and throw it. Easy. It was a little difficult to pick it back up from the ground when I was on one foot, though, but that made the game more fun.
Original author: queensgirl