Invisible Ink Pen, MALEDEN Upgraded Spy Pen Invisible Ink Pen with UV Light Magic Marker for Secret Message and Kids Halloween Goodies Bags Toy (6pcs)

Spy Pen:The ink is invisible after you write with it,unless you light on the cap blacklight to see the secret message perfectly. Invisible Ink Pen:Harmless and flavorless ink,healthy toys for your children!Smooth and colorful disappearing inks on T-Shirts,paper,skin and any surface!Permanent but washable!