@variablepulserate it's like tag except it's payed in a pool and the person who is "it" has their eyes closed. The person who is "it" yells "Marco" and everyone else yells "Polo" in response. The person who is "it" then has to try and figure out where someone is to tag them.
I still have a vague idea what day of the week is since I do have to work. 😬