This DIY Jack Skellington is posable, waterproof and cost $15 to make. And there’s even a DIY Jack Skellington bat wing bow tie pattern at the link! Running with Scissors wrote:
…the basic components of Jack’s body are a solid wood “spine” with paper mache clay coating for the chest and head.
Arms, legs, and hands are wire, with paper mache clay finger bones.
Clothes were hot glued on.