well i'm seeing gintama 174 and they play a game called magical banana so i tried google it and i found let's see if i can explain so we can start playing ^^
In this game, one person begins by saying, "Banana to iitara, kiiro," or "If you say, banana, I think 'yellow.'" The next person then says, "If you say yellow, I think, 'giraffe. the next "if you say giraffe, i think .." and continues xD
this is a japanese elementary age children game ^^
I'm first xD "If you say, banana, i think 'yellow' "