How is this moving mouth effect done? I'm not very skilled with paper. I'm a video editor looking to achieve this effect.



I'm well aware that most of it is special effects, and things like articulation are made of wire attached to the hands and arms of the character. Although, the mouth is make by practical effects. Could some good soul give to me a way to create a similar effect?
If I had to make it, I'd do something like this: 


The face has to go on one piece of paper/cardboard, and the lower jaw is a separate piece. The strip of paper that is attached to the lower jaw, will go through the hole just below the face, so you can hold the strip and move it up and down without your hand being visible.
A large chin can cover the hole, when the mouth is closed. When the mouth is opened, you'll see a part of the hole.