Merger
This device performs the opposite of the splitter: the merger combines two marbles into one. A marble rolls into the merger and awaits arrival of a second marble. The merger will now be lit. When the second marble rolls into the merger, a single marble will be released, whose color will be determined by the colors of the marbles involved. Please click Merger Rules for a complete and comprehensive explanation of merger behavior. Also see Plato’s Symposium for a few guesses as to why two previously unrelated, differently-situated marbles might be engaging in this behavior, and why they might need a special place to go to in order to affect the behavior.