For casting the legs, i was recommended to cast the legs to just below the boob line so I sculpted the legs and waist out of plasticine.
I used lighter fluid to help make the sculpt soft for the sculpting and smooth out the sides so that the puppet wouldn't have any irregular lumps or bumps in it.
I use Lego for the frame because it is much easier to make square shaped molds this way... plus at heart I am still 7.
After a lot of plaster being used up, I had two halves of a leg mold all done and dusted.
They had a few air bubbles in them but with the help of some Mulliput I was able to smooth those out.
The only problem was some parts of the mold chipped and cracked when they were opened so I reckon a lot more mulliput sculpting is required in order to tidy them.
The armature is now ready for leg casting... just need to pad it out and we're good to go. Sadly the plasticine mold did not survive. But you know what they say. "Sometimes one must be sacrificed for the good of many".