<Tr> <Th> Random chance </Th> <Td> Low </Td> </Tr> <Tr> <Th> Skill (s) required </Th> <Td> swimming, sound localization </Td> </Tr> <P> The sport Marco Polo / ˈmɑːrkoʊ ˈpoʊloʊ / (listen) is an American form of tag played in a swimming pool . </P> <P> One player is chosen as "It". This player closes his or her eyes and tries to find and tag the other players without the use of vision . The player who is "It" shouts "Marco" and the other players must respond by shouting "Polo", which "It" uses to try to find them . If a player is tagged, then that player becomes "It ." </P>

Who came up with the game marco polo