The black column marble gambler 
The "Black Column Marble Gambler" is an object built from old relays and components salvaged from an ancient telex machine.
Try to guess through which hole the marble is swept.
A lift transports the marble to a rotating disk on the top, where a Smurf will try to sweep the marble into one of the gates.
Your reward when you guessed right? A bright electronic smile!
Watch it in action…