There's an activity I engage in every couple of years or so, and that is to bring printmakers together to make a print. These collaborations baffle those who know me as a loner, but nevertheless, they continue to fascinate me.
The procedure is simple, take a block of wood, draw something, chop it up into pieces and send the pieces to the various participants. Each woodcutter cuts their piece of wood and sends it back to me, I put it together, print it and send the completed prints to everyone.
IN progress is the Cairn, information is here:
http://www.1000woodcuts.com/projects/cairn/index.html
Completed is the first puzzle, a Web:
http://www.1000woodcuts.com/projects/puzzle/finalimage.html
Undoubtedly, there will be more...