Us girls played '2-ball' up against the old toilet block doors all playtimes& lunch breaks when i was in primary/ junior school.(bouncing 2 rubber balls or tennis balls up against the door,or wall,together,bit like juggling but against a hard surface) i think there was a chanting of some rhyme or other,but i can't remember it now.some girls could do 3 at once,sadly i wasnt dexterous enough for that :/ Oh,and 'cats cradle' with string or wool.