Invisible Ink Pens for UV Light Lessons

With two or more Spy Pens, secret messages can be sent between friends! This incredible pen writes with invisible ink. Reveal the hidden message with the pen's special ultraviolet light. Use this pen to mark unknown samples for students in the laboratory. Batteries included and replaceable. This item was quick to become one of our most popular everyone we've shown it to wants one! Style and color may vary.
With two or more Spy Pens, secret messages can be sent between friends! This incredible pen writes with invisible ink. Reveal the hidden message with the pen's special ultraviolet light. Use this pen to mark unknown samples for students in the laboratory. Batteries included and replaceable. This item was quick to become one of our most popular everyone we've shown it to wants one! Style and color may vary.
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