no not even close - I presume you're talking about the crocodile.
It's way simpler than that
Project CrocodileYou take double walled pin pong ball halves (cut one in half and press smaller half inside larger - it works) These are the teeth.
Attach say six to a piece of wood and repeat. Two jaws.
Attach each jaw to a piece of wood and then fix the two arms together so that the jaws open and close like a pair of scissors.
Also make sure you align the jaws so that the ping pong ball halves meet exactly.
Then all you need is a bucket of cement and a sheet of plastic.
Scoop up cement and close jaws to mould ping pong ball size cement balls. Tap jaws to loosen balls and turn out onto plastic sheet to dry.
Repeat till you run out of cement.
Now obviously there are a number of prctical considerations.
Compression. At least one set of of teeth will need to have holes drilled in to allow compression of the cement into speheres.
Also it might be necessary to spray the teeth with wd40 prior to the bite.
Minor things and easily sorted.
Can't see any reason why it won't work. Just haven't got round to putting it together yet
Got lots of teeth lol
Even got a jig for marking the exact centre of a half ping pong ball for the nail in point for attaching to the jaws.
Just not built it yet