Four Panels

Four panels is a simple pencil-and-paper drawing game for three or more players. One person draws an image of two characters interacting, and hands it off to the next person with the paper folded so that they only see half of the image and add their own second half. They then do the same thing for the next person. And as a final surprise you get the hidden collaboration between the first player's first half and the last player's last half. The way the paper is folded means you can always reconfigure the paper to see the image for any round, which reduces the risk of "they ruined it!" or "I don't want to mess it up!" concerns that can crop up in collaborative drawing games where you directly manipulate other people's images.