Ok....
I have a game idea that requires the board to shake or rock.
If you remember, think about the old electronic football game, you turn on that switch and the gamefield vibrates and the little football guys would move.
I need to figure out "what" made the board shake/vibrate. I am trying to prototype the game and having this component would be great.
Now to increase the difficulty of find such an item, my idea also requires the shake/rock to randomly occur.
maybe you could use pager or cell phone vibrator motors ...
the way they do it is the output shaft of a vibrator motor has a non-uniform weight attached to it. so as the shaft spins, the weight causes a vibration.