With the 007 Spy Pen you won't risk having your secret messages fall into the wrong hands! Your message will be invisible to the naked eye but can be clearly seen using the included ultraviolet light. You simply write your message (which will be invisible) with the writing end of the Spy Pen. When you want to read the message use the ultraviolet light located on the other end to illuminate the message and it will magically appear. Although this product is packaged as a fun toy for children it can also be used by adults to mark valuables for easy identification by police in case of theft.  Orders of 12 or more units will come in a countertop display box.