These gimmicks are the most powerful tools a magician or mentalist can use. It is very difficult to believe that with such an inexpensive, unobtrusive gimmick, you can produce a staggering number of effects that look like real miracles. You can write letters, numbers, check marks, etc., surreptitiously--right in front of the audience--giving the impression that your message was written well before the event or effect took place. These gimmicks give you limitless possibilities. (4 mm. grease marker, also available with a pencil-lead tip.)