Have you ever seen children in costumes and masks ringing doorbells and crying out, “Trick or Treat?” This is a very common sight every year on October 31. The children are celebrating Halloween. On this holiday children dress up as witches, ghosts, goblins, and other characters. They ring doorbells and ask for a piece of candy or some bubble gum or even a few pennies. It they do not receive a treat. They may play a trick on the person or on the house.