Postcard made from papier mache - a project involving sending a plaster cast of your belly button. Cracker Jack then made it into a postcard and sent it back complete with navel fluff. Mid 1980's. He has written - "Party at J.P. Jacob's place in NYC this week and will be visiting? many navels."
Bumper package from Vortice Argentina from around 1998. Mail art 'zines and posters, flyers, postcard etc. with contributions by Robin Crozier, Joe Decie, Alan Turner, Arto Posto, Sticker Dude etc.