Very nice walking stick and haven't seen the water and steam trick for the ball but here is two of mine I did about 10 years ago. Both items are made from one piece of wood each so I know first hand that the ball inside a block of wood is done with nothing else but a sharp knife and time and the only foreign item added is the metal hook to hang them up with. The chain is a lot harder but no tricks are used each link is free moving and again only a sharp knife was used.
Later Jimmy