Ritta Ikonen created about 150 mail art pieces and sent them to Margaret Huber (one lucky recipient!) over the last 6 years. I'm amazed the post office actually accepted and delivered them*!
I love to receive mail and would adore receiving one of these creative pieces. See more pics and read more about it here.
(*Margaret does note: "I soon realised that Riitta was not only recording her experiences, but also using the postcards to test the dedication, patience and humour of the postal system." Love it!)