When attending many art retreats the participants are anxious to create "trades". These can be anything you want to create and it's exactly what it implies: You trade your art for other artists art. Of course these are small items as to be able to travel with them and accumulate them!
I was able to make 70 trades and then I ran out of the tags I was wrapping my silk ribbon strips and fabrics on. I may or may not get back to making more.