Source: Distracted more easily than a 5 year old.
Stashed in: Memes!, Awesomesauce, Your argument is invalid., Perfect GIFs!!!, Rube Goldberg Machines!, See., Party!
I find blue ball machines mesmerizing.
A smaller version of the blue ball machine or blue ball machine 2...
Above is the simplest of all the blue ball machines.
Here it is in reverse:
For $140 you can buy a Chaos Tower: http://www.amazon.com/Chaos-81022-Tower/dp/B000XQ8OHW
Blue ball machine balls need not be blue.
See for example this marble on a penrose triangle:
Complex blue ball machine.
Thank you sir may I have another?