Wouldn't really consider a discrete vibrator afixed to a solid platter a "machine" per se, but if you want to call it that, sure. I gave the problem 10 sec of back-of-the-envelope thought. 10 sec more suggests you can skip vibrator integration by selecting a more rigid transparent substrate, e.g. glass...Skittles would naturally rattle on that as a package is loaded. 10 sec more suggests you can constrain camera movement even further by using carefully oriented mirrors. How far down the rabbit hole would you like to go?