Best idea I've heard of in a while: a mother and daughter mailing drawings back and forth over years, each woman adding a little something to the pieces. It sounds like something out of Borges. It's actually the story behind doodlespark, and the collaborative drawings by mother and daughter artists are available for sale as notecards. I found this concept so inspiring... not sure what it's inspiring me to do yet. But just the idea of it!
Found via one of my favorite design blogs, Bloesum.