Invisible Ink Pens and Notebooks, Disappearing Message Markers, UV

See if your undercover friends can unravel the mystery! 12 Pens Included Take your pick from blue, pink, yellow, or green! Simple to Use With an instruction booklet to guide you, simply pick up a pen and start writing.

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Invisible Ink Pens and Notebooks, Disappearing Message Markers, UV Light Spy Pen

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