This is a game for a large group. One person must be the 'host' and cannot play. In a classroom setting, the 'host' is the teacher. Someone in the group is chosen to be the 'chooser'. Everyone puts their heads down on their desks and extends one thumb. Then the chooser goes around touching the thumbs of six people. If a person's thumb is touched, they go to the front of the room. When all six chosen people are up front, the chooser yells "Seven up!" Then everyone raises their heads and has to guess which of the seven people is the real chooser.