Some of you may be familiar with this concept of ATC's ( Artist Trading Cards). If you are not then let me ellaborate. Basically you take a small card 2.5 inches by 3.5 inches. And you can paint, draw, or make little collages. But the basic idea is to produce a little mini masterpiece of your own work.
This has been going on world wide for many years. It has recently increased in popularity. Artists are trading these with other artists, and building rather unique collections of portable art. Very much the same idea as sports trading cards, only contoured to the art enthusiast.
I got interested in this when I was a member of an online artist community. One person volunteered to coordinate the exchange, and set a dead line for each. Then the participants would make there cards and mail them off to the coordinator. They would in turn arrange them fairly into sets, so that each participant got one set with a card from each artist.
The cards at the top were the sets I contributed to the two exchanges I participated in. It was a great deal of fun.