We love playing Scribblish. It's like the old Telephone game but with pictures, with players alternating writing captions for pictures and drawing pictures for the captions. It's most fun as a non-competitive party game, just reading the cartoons at the end of each round. It's useful as well: we taught it to my daughter's then-boyfriend and said not to take so much time on detailed drawings; they should look like XKCD. And he knew what I was talking about! Obviously a perfect match. They were married the next year.
Unfortunately no one else seemed to share my family's passion, and the game was discontinued. You can't get replacement pads any more. So I printed my own (it's just a bunch of lines on a sheet of paper cut in thirds). And I wanted to leave it here so I could find it again: