This is really cute: http://www.rei.com/product/687141
Essentially it is a deck of cards with illustrations of various knots and some no. of points to each knot (square knot 1 pt.), a strand of cord, and a couple little wood sticks. Very good price ($6). Not all the illustrations are equally clear, but still... Might be nice of kids of about scout age and adults, good campsite game, and even good as solitaire.
I think it is a cool little product. Got one review as 5 stars.
--des