W.E.
this may be a bit more than you want to do, but i have seen really cute "eyeball" sandwiches made from already made meatballs, sauce from a jar, and little sub sandwich buns. two meatballs in each sandwich with olives for pupils!! also "bugs" made out of rice krispy treats with licorice (the really thin stuff) for legs and antena and raisins for eyes. you could probably get a lot more ideas by googling halloween finger foods. good luck!!