Yarn color cards.

[orangecadette3.livejournal.com]

I've never bought a yarn color card because I can't bring myself to pay for something just to see colors.  I think it'd be neat to do something crafty with all the bits of yarn, but I can't think of what (and I don't even know if this is possible, is the yarn glued to the card or something?).

Has anyone ever made something out of a yarn color card?