|Palm of hand: ||Back of hand: |
Below is a video from 2006 of the mechanism in action:
The red trigger seen in the video is from one of those "snapper" toys with a plastic animal head on the end of a stick.
In 2010, I replaced the trigger with the arrangement seen below: the four threads run through a hoop (made from a paperclip) on the arm rod's dowel and tie onto a plastic ring, which I pull to close the puppet's hand. This method gives me more control and a wider range of motion.