What are some fun and easy tricks to decorate Halloween cupcakes?

Orange frosting and chocolate chips for jack-o-lantern facial features brings back childhood memories. White icing with decorator icing forming a cobweb. A spider could be fashioned out of black licorice for legs and a gumdrop. Marshmallows toothpicked in a stack and dots for eyes could become a ghost. Part of a cookie with "R.I.P" written in icing. Just a few ideas...