On Facebook, I saw the call for entries for Mail Art, from Two Hands Paperie in Boulder. Here is a link to their blog which gives all the details: http://www.twohandspaperie.com/blog/
Here is my first entry:
I began this image by addressing the envelope and forming the shape and two hands around it. I added my return address and two footprints (seemed like the thing to do) and created arms and body to go with the hands. Different values of patterns were added to the background to create more visual interest.