This is my very first attempt at resin casting. I just had to choose a really complicated subject! It's too expensive to mail order much for supplies, so I tried the bathroom caulking type of silicone for the mould. It required mixing it with white gas so all in all it was a pretty toxic process! But COOL!
The jaw opens and the hinge is cut from a corrugated plastic NDP election sign (they did not win!). It pulls closed by black spandex attached to head and jaw.
I followed the methods used in this three part tutorial from Stiltbeast Studios for making a silicone caulk mold. For the jaw and teeth I used the soapy water method. Youtube is pretty cool for learning how to do weird things!