In advance: Mold candy skulls. Attach halves together with melted candy.
Also in advance: Make arms. Dip pretzels in melted candy; set on waxed paper-covered board. Chill until firm. Trim pretzel to 2 1/2 in. long. Attach pick to pretzel stick with candy; let set. Using melted candy in cut parchment bag, pipe hand, fingers and thumb around stick. Chill until firm.