I just watched a video by an electronica artist from Brooklyn named Moldover.  Yeah, I’d never heard of him before this video either.  He’s done a brilliant job designing the packing for his first CD.  He built a light-based theremin and designed the track listings into the circuit board!  He’s got three different versions of the packaging available: one is a printed cardboard (no theremin involved), one with the printed circuit board as the tray and insert (full-size theremin here), and one with the paper-printed version of the circuit board and mini-theremin.  The full and mini theremins also have a headphone jack so you can listen in private or pump your creativity to a sound system.  Pretty amazing!  Check out the video below to see the artist explain it: