You take any old cereal box. You place it on the floor. You then go round each person of the room and they have to pick it in their mouth with only their feet on the floor. They cannot kneel. Once everyone has done it some of the cereal box is ripped off so it is not so tall and you go round again. If people are unable to do it they are out. The winner is the person who can go the lowest (preferably to just the base).