Lots of great ideas already (wow kimck - 20 hours?!). Here are a few more. Doodlepro, mad libs, road sign bingo for all (we found some cool old-fashioned ones with the sliding red windows; here's what they look like: http://www.boardgamegeek.com/image/234825), rubik's cube. I have to second the pipe cleaners, though i've never thought of cutting them!