Partially completed leg pieces, made out of 1/2 inch blue ester foam.
A leg piece a little while later: foam bolts attached, some areas covered with a layer of nylon, and the whole thing sprayed with a thin coat of spray glue, to seal it.
Last but not least, a shot of the creature's back at the same stage in the process (foam construction, nylon, and glue). The two holes you see are sockets for short lengths of tubing that will connect from the back to the chest, as a sort of breathing apparatus.
That's all I'm giving away at the moment, but keep checking for more updates. After a coat of latex and then a nice paint job, the creature should be complete shortly.