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Our Secret Message Writing Set contains 2 pens that write in invisible ink! The cap of each pen contains a powerful UV "blacklight" beam that reveals your secret message. A super-fun way to share juicy info with your friends and fool your enemies! Also great for keeping track of all of your Internet passwords!
How does it work? The invisible ink contains special high-brightness ultraviolet viewable compounds. The ink is completely invisible in normal light. The secret messages can only be revealed by the beam of the UV "blacklight" in the cap of the pen. This beam consits of ultra-violet energy close to the visible spectrum of light which causes particles within the ink to "fluoresce", illuminating the message.
Set includes 2 pens. Batteries included. Invisible ink is non-toxic. Great fun for adults and kids alike, but not for those under 3 years of age due to small parts.
