We usually do a 'meat head' You take a plastic skull, cover it with red fruit roll ups, then cover it with luncheon meat and put on egg eyeballs and fake teeth....once the guests eat a layer of meat, there is the muscle (fruit roll ups) underneath. We usually put a tray of cheese and crackers next to it. Its pretty gross and people love it! I found the recipe here:
http://carlah11.tripod.com/page4NEW.html
"Beware the Jabberwock, my son! The jaws that bite, the claws that catch! Beware the Jubjub bird, and shun the frumious Bandersnatch!"