Not sure all of you know, but it's a tradition with wooden jigsaw puzzles to write down who did the puzzle when on the back of the lid, or on a piece of paper kept in the box. This turns the puzzle into a memory-node, and helps build a sense of personal history. My mom has done this for years with an old boardgame called "Stockticker" and you can go back to the 1960's and see which friends were visiting them (and who won!), and it always makes her smile to look through it. -Maya