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Send secret messages anytime with this 50-pack of Invisible Ink Spy Pens featuring built-in UV lights. Perfect for kids, students, or anyone who loves a bit of mystery, these pens write with invisible ink that can only be revealed using the attached UV light. Ideal for use on paper, cards, and other..

Create invisible messages and reveal them with the built-in UV light using this Pink UV Secret Ink Spy Pen. A fun and safe gadget for kids, it’s ideal for writing secret notes, playing spy games, and going on treasure hunts.The invisible ink is completely harmless, washable, and works on paper, fabr..