This spy pen is the top secret way to write! Write a top secret message with the invisibility ink, and reveal it with the UV flash light! You can use this in two fun ways. First, one end of the pen has a functional ball point pen when you want to write things for others to see. Open the cap to use a clear marker that
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Spy Pen:The ink is invisible after you write with it,unless you light on the cap blacklight to see the secret message perfectly. Invisible Ink
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