Many moons ago I started making ATC's as a way of using up some of the small scraps of paper left over from card making.
Artist Trading Cards (ATC's) have to measure 3.5 x 2.5 inches and they have to be traded not sold. Those are the only 2 rules. Apart from that, anything goes!
They can be made using any theme, style or techniques - and it is quite fun trying out new stamps or stash on them.
I have now made hundreds of them over the years and swapped them with crafters from all over the world. I've posted up photos of a few old ones to show a few examples.
I now host a monthly theme swap on Docrafts and I am amazed at the variety of different cards that turn up every time. New members are always welcome to join!
I am also part of a small international ATC swapping group of around a dozen - so I get the chance to make and receive lots of these little treasures!