Then check out the "The Pianist Concert Hand".
The manufacturers say that you'll be fascinated by their precise movement and precision-tuned mechanical genius as the digits play selections from Beethoven's ‘Fifth Symphony’, Scott Joplin's ‘The Entertainer’, or Chopin's ‘Minute Waltz’. " The various gears and levers inside this battery-powered clear plastic hand interact to move the fingers as if they are playing one of six classic piano pieces.
Added bonus: Creepy enough for Halloween fun.
Details ahoy. And here.