Yanko Design has put together a piece on the design of the retro mp3 player of my dreams. As you can see from the pic, the design is based on a cassette tape and to rewind or fast forward you need to rotate the spools with your finger or a pencil. Yes! To charge the player? Simple…spin the other spool. If they packaged these with some old-school can headphones, I would be the envy of everyone on the morning train. Oh, how I dream.