Saw a paper based game mentioned in another forum. I thought it would be a cute smartphone game. Walmart Bingo. I envision you start the app and the board is displayed. Tap a square to put a red X in it. A fancy customization would be to allow changing the text in a box. That would let it be any observed activity game. Bigger audience. I would like an Android version but an iPhone version would be good, too. I see it as a 99 cent app.