The tentacles are also cast seperately from the body. A two piece mold is made.
The mold will be injected with silicon. The bars in the mold create channels to allow the air to escape as the rubber is being injected.
Lego is used to create an easily assembled and disassembled case. Silicon mold rubber is poured over the pieces. Once dry the mold is turned over and the clay cleaned out. As before, a layer of vaseline is used as a seperating agent to stop the two halves of the mold from adhering to each other.