During the course of any magic or comedy routine the performer opens up a hardbound book and real flames shoot out from inside ! Of course, you could also open the book without having the flames-it's under your complete control at all times. Battery-operated (no flint wheel to fuss with) and quality-made.
Well made, some careful handling is needed [anywhere you have an open flame - careful handling is called for]. Works every time, thanks to the battery ignition. I like to use this as a lead to the Dracula book test. (this book is too hot to read, let's try another)