From Brian Herzog, Swiss Army Librarian:
Earlier this summer, my coworker Tommy got the idea for a library art project: mail a letter to 200+ libraries across the country, asking them to send him one of their library cards.
He enclosed a return envelope, and most of them responded! For the next few weeks, Tommy's envelopes, with new library cards enclosed, poured into the library from all over the country. It was fun to see the variety and creativity of library cards.
Tommy's project was dependent on how many library cards he received. In the end, the number he got fit more or less perfectly on one of the coffee tables in the library, so he got permission to arrange them on a table and cover them with a protective epoxy. It looks great in the library, and the plan is to leave it in the library permanently. Tom also put up a sign on the table explaining what he did - the table is very eye-catching, and has already proved popular with staff and patrons.