Many people thought Polo's explorations would yield nothing, and just be a wild goose chase. Therefore, the game where you blindly stumble along (sailed) in an area of water (the oceans he sailed),...
There's no real documentation why the name "Marco Polo" was added to the swimming pool tag game also known as "Mermaid on the Rocks". Maybe it's the fact your "exploring" the pool, looking for your...