House Of Marbles Invisible Ink Spy Pen
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Make a start on your secret agent duties with the U.V Spy Pen by House of Marbles. Write secret codes and notes on paper with one end of the pen then shine the special U.V light on your message to show your close accomplices. To anybody else it will just look like a normal piece of paper. Shhh it's a secret!
Not suitable for children under 3 years