“It was to be called Polasound, and the idea was truly eccentric: to attach an audio caption to each Polaroid integral picture. The idea seems to have been that you’d clip your picture into a little plastic carrier that held a strip of audiotape. For recording and playback, you’d pop each one into what looked like a small radio with a slot on top. The gizmo never got past the drawing board, but it’s one of the most bewitchingly weird notions Polaroid ever considered.”