What do ghosts, goblins, ghouls and things that go bump in the night eat? Well, after they take off their Halloween costumes, they might enjoy a caramel apple-on-a-stick. Of course, the appeal of an apple-on-a-stick is not limited to Freddie Krueger, Count Dracula or Batman. Princesses, dragons, dinosaurs or even Elsa, this year’s No. 1 Halloween costume, from the movie Frozen, may also enjoy one.