Did you know that when you go trick-or-treating on Hallowe'en you are taking part in an ancient Celtic festival? This collection takes us back to the origins of many festivals that are celebrated throughout the world and traces some of the stories that are connected to them, including stories from the Jewish Festival of Purim, and Christmas.Did you know that when you go trick-or-treating on Hallowe'en you are taking part in an ancient Celtic festival? This collection takes us back to the origins of many festivals that are celebrated throughout the world and traces some of the stories that are connected to them, including stories from the Jewish Festival of Purim, and Christmas.