I've been experimenting with the idea of keys as cards just lately, starting with these cuties.
They really do make an unusual card, either stand alone or as a topper. The difficulty I have is that because they are double sided, when you come to print them out, unless you have a flatbed printer like my age old Epson, the keys come out offset. doh!
I'll have to see about a fix for that - something else to keep me attached to my computer for a few minutes. This is a standing joke in the family. I only have to say 'It'll only take a minute' & everyone settles down for the long haul - I do tend to get a bit sidetracked occasionally :0)