Everyone stands and forms a large circle. Two players are selected to be Ojiisan and Obaasan. One of the players is blindfolded and the other player holds the bell. The blindfolded player is then spun around. The blindfolded player then calls out to the opposite player ";Obaasan"; if its a girl or ";Ojiisan"; if its boy. They then ring the bell. The blindfolded player must find the other player. The player must always ring the bell when called. When the player is finally caught, then he/she becomes the blindfolded player.
Source: From the original site.