Here's a video showing the integration of the rotary clock and the cake clock! All three distance sensors are triggered, causing the cake clock's motor to spin clockwise (although you can't tell because there's nothing attached to it) and the fourth animal (the dragon) lights up. We then spin the "4" on the rotary face to the 12 position, triggering the rotary clock, and all the LEDs light up blue to show we solved the puzzle! Yes, we realize that the video is upside down, but, what are you going to do really? Sorry that the preview image was misleading. We thought it would look better that way.