Perhaps, mount a small shack on one of these vibrating motors and as a train passes, a photo eye can trigger the shack to vibrate??? Again, we aren't talking earth quake here.
Hey, I like the idea of the small shack – I’ve got just the thing – I built a PaperCreek Models Outhouse (complete with little man with trousers-down inside).
Wouldn’t he love being shaken up whenever a train passed!
BTW – have you seen PaperCreek Models paper buildings – simply outstanding, and the outhouse is free for download.
Jeff Law
Even better have the vibration open the door! Bob