A Skeleton is a minifigure that appears in various themes in many early sets. It was the first in a long line of skeletons (see the Skeleton Disambiguation Page) and feature ball and socket joints and rounded eyes. They appear in Pirates, Castle, Atlantis, Harry Potter, Pirates of the Caribbean and Ninjago sets. Skeletons are also playable characters in video games for comical purposes, only playable under the "Extra Toggle" feature.