A hot potato is a kind of virtual timer that is passed between mobile devices that players hold. During the game, the hot potato counts down to zero when it explodes. When this happens, the person holding it is out. The game repeats until only one player is left. Players can "throw" the hot potato to another player by moving close and making a throwing action with their arm (while holding their device). Moving too far from the other players increases the chances that a new hot potato will be generated on your device. That keeps the players together. Until one of them receives a hot potato, in which case it pays to move away from them so they can't throw it to you. The games our children will play...