Spy Stamp Set - Secret Message Spy Marker Ink, Stamper, with Flash Light - Hidden Message Pen - Invisible Ink and UV Light
This spy set is a ton of fun. It includes a thumbprint stamper, a stamp pad with invisible ink, and a small UV flashlight. Use the stamper or your fingers to stamp fingerprints invisibly on paper. You can only see them when you shine the light on it. Make up your own detective game to find clues to see who is guilty!