I tried doing particles within the stomach or whatever but even if they stay in there due to collision I can't see them so that didn't work.
I was goofing mostly but if I could get a liquid or whatever in there that would have added better looks. That was a just a brief thing I did for fun thats all. I may do a Hollywood type of killer robot or something sometime after my WIP French kitchen(The kitchen is going to be as realistic as possible)