Every Spy Needs To Keep A Trusty Spy Pen With Them At All Times To Keep Prying Eyes Away From Their Ultra Secret Communications. With The Spy Pen, You Can Write Your Top Secret Messages With Its Invisible Ink And You Can Decode Secret Messages With The Ultra-Violet Light! When You Need To Go Undercover And Blend In With The Normal Population, You Can Use The Ball-Point Pen To Write Everyday Notes. Invisible Ink Spy Pens Decode With Uv Light Flashlight Press Button To Shine Light Assortment: Red, Yellow, Blue, Green Black Ink 6" Long Warning - Choking Hazard - Small Parts.