Children go in costume from house to house, asking for treats such as candy or sometimes money, with the question, "Trick or treat?" The word "trick" refers to a "threat" to perform mischief on the homeowners or their property if no treat is given .Halloween costumes are traditionally modeled after supernatural figures such as monsters, ghosts, skeletons, witches, and devils.Because the holiday comes in the wake of the annual apple harvest, candy apples, caramel or taffy apples are common Halloween treats made by rolling whole apples in a sticky sugar syrup, sometimes followed by rolling them in nuts.