Our Confidential 3 color + Secret Decoder Spy Pen is a must-have for the super spy's toolkit. These multi color pens let you change ink colors (red, black, blue and invisible ink) by pressing coordinating tabs on top. Write a message with invisible ink (the green tab) and use the ultra-violet light to reveal.
Comes in 4 colors: red, yellow, green, blue
Ink colors include: red, black, blue and invisible