I saw these on display at Pinball Expo in the Chicago area last October and they were magnificent. My kids loved pressing the buttons and seeing what happened, and I had a great time walking them through what's happening. The amount of creativity and ingenuity that went into these mechanisms and assemblies is something to behold. Especially the ones within the electromechanical (EM) games, which were basically 60s / 70s, they did so much with so little when it comes to computing power.