Hilariously, a five year old is confused by convincing 'evidence' that his body is disassembling, like a cheap doll.
The pop-eyed characters of Parts completely complement the crazy fear the main character experiences. More importantly, Arnold shows children how true facts can be misconstrued. Laugh with your children. Then, see if you can find real world examples to show older children that the logic error in Parts is horrifically common, even among information specialists such as journalists & academics.