If you don't have access to a bandsaw for machining the aluminum foot, as Nick's video shows, you can use my 'hammer the washer' method and some steel epoxy.

I put a little tutorial on my site here:

http://www.graydenlaing.net/animation_puppet_claylatex.html

I used what we call 'tie downs'.  Nick Hilligoss made an excellent video tutorial on it here:

http://www.stopmoshorts.com/tutorials/tie_downs/mov_tie_downs.html

re: really nice secuence. How do you make the puppett walking? (excuse for my english)