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Exchange secret messages with your siblings and friends with this 2-IN-1Invisible Writer Pen! Each pen has a black light in the cap so you can read messages written with the invisible ink. As an added bonus, each pen can also write like a normal blue ink pen.  Perfect for your secret diary or school notes to friends! 

  • both invisible ink and regular black ink.
  • Requires three AG10 batteries (included).

Recommended for ages 5 to 85!