By Danielle Kate Wroe Elf on the Shelf is an adorable family tradition where the cheeky elves find themselves performing different levels of mischevious acts – but one woman was branded as “insane” after she made her elves pull off a huge prank, involving her car. Each day, parents who participate in the tradition will ensure that their elves are doing something funny, or sweet, that their kids will really appreciate. But naturally, the more years that elapse, the harder it gets to think of new innovative ideas, and parents may find themselves really going above and beyond to please their chil…