just if anyone wanted to know how the muppet performers really operate those eye mechanic muppets, couse I tried one once. The "trigger" is actually a handle like the one you might have on top of a spade. And it's not "hanging" from the top of the head like on many designs, it's laid straight down, coming from the nose, with the handle pointing towards the back head. So when you put your hand in it, the handle is on top of the mouthplate, and you put your fingers on top of the handle. To move the eyelids, eyebrows or whatever, you pull the handle back towards the back of the head with your fingers, so that instead of pointing straight pointing at the nose part of the puppet, your fingers are bent, pointing down at the mouth plate. This works well, couse you are able to move the both the mouth and eyes at once.