Marco Polo is an age-old pool game that's like hide and seek with a twist -- the seeker has to keep his or her eyes closed while hunting and tagging the hiders. This may sound impossible, but the seeker has a secret weapon. When he or she says "Marco," all of the other players have to reply "Polo," so he or she will know where they are. Skilled seekers keep up a steady stream of "Marco" as they make their way around the pool. The first Polo caught becomes Marco in the next round.