All installments of "Animal Crossing" allow some form of communication between players, both offline and online. A single village can house up to four human players, though only one can be exploring the village at any given time. The players can interact via written messages through the village post office or bulletin board. The GameCube iteration allowed players to travel to other villages by trading memory cards written with the game data, but all subsequent installments allow players to travel and interact online via Nintendo Wi-Fi Connection, although "" also allows the DS Suitcase to travel to others' towns.