The blow book, better known as a magic coloring book in modern variations, is a classic magic trick that has been performed for hundreds of years. It was most popular from the 16th to the 19th century, when variations of the concept were a staple of the book publishing trade. It has been referred to as the oldest example of a manufactured prop used for magic. It remains a common trick today, albeit mostly performed for children, preferably at birthday parties or other events due to the visual nature of the illusion.