How would you like a robotic hand that mime-plays Beethoven's 5th, Joplin's Entertainer, or Chopin's Minute Waltz while playing back the actual song? What? You wouldn't? Yeah, us neither. Especially because all it does is mimic piano movements, and not, you know...other stuff.
Nevertheless, this weird-looking hand works on 2AA batteries and starts when you clap. A cool office toy for guys who want to scare little children on Bring Your Daughter To Work Day.