MP3 Player for Your Wallet
It seems like just about anything can play MP3s these days, so the trick is to find one that's the right size for your lifestyle. This player is so thin, it's about the size of a credit card, meaning you can slide it into your wallet as your walking down the street or waiting for the subway.
There's one thing I hate, it's when people know you're listening to music when you are trying so hard to pretend your are listening to them... I suggest a wallet sized MP3 player that way when Nana starts rambling about something in 1908 you can nod along while secretly rocking it out.