The best part about instant films like Polaroid is its ability to develop film rapidly as you wait. Although, The Impossible Project sees the instant photos as merely a gimmick. By developing special Photo Pens that work perfectly on the instant films, a result of testing 358 pens altogether; the instant photos can be turned into greeting cards, business cards, invitations, or a simple message to friends. For the artistically inclined, these colorful pens give the ability to customize each photo with a personal touch. A set of size colors are packaged in a black leather pouch, making it easier to carry them with the Polaroid cameras. Find this item on The Impossible Project online shop now.