Hey there, a Google search brought me to you. I'm looking for a low-tech way to have skull props whose jaws can be manually operated. (singing to Monster Mash in show). I know you did a tutorial a long time ago but I couldn't find it here. I have two plastic skulls with jaws hinged with a screw. I figured some kind of rubber band or spring to keep the jaw closed and then maybe fishing line to pull the jaw down. Don't know if that will work or not. Any advice would be appreciated.