I took more Velcro from the tents to attache the mouth to the jaw. I used fabric from the red ten and a piece of foam from the window of another to give the mouth structure.
the tape here is marking where the velcro needs to line up underneath to match the jaw
to make the bag i cross stitched it into shape
I then sewed a piece of elastic to top so it can be worn like an apron over the wearers neck to keep it up and give the mouth depth.