Jason. Such 3D printed cosplay ideas can amaze all your friends! If your child wears a 3D printed costume of Dr Finkelstein this Halloween, you can craft another character from The Nightmare Before Christmas for yourself. It took him over 100 hours to 3D print all 29 parts of the Jack Skellington cosplay costume. An outfit of a pirate is among the never-boring ideas of 3D printing Halloween costume ideas for children.