Ultraviolet Spy Pen

The Ultraviolet Spy Pen allows kids to write invisible messages and is a perfect item for the spy master in all of us. Users just write a message on a piece of paper, and when the ink dries, the letters will not be visible unless they´re exposed to ultraviolet light. The pen comes equipped with a small UV light so the writer can show the message only to those who are allowed to see it. It requires no batteries.