via mailmeart.com
"Soliciting art and illustration from contributors across the world, Mail Me Art uses the postal service as a creative medium. This collaborative art project, the brainchild of Darren Di Lieto — founder and co-editor of illustration-news portal Little Chimp Societ, collected over 600 submissions in the first installment which were mailed in on postcards, envelopes, boxes, and pieces of wood and cardboard."
excerpt via flavorwire.com