HeroFiber 12 Invisible Ink Pen with UV Light and 12 Multicolor Notebook Set. Party Favors for Kids 8-12, Escape Room Party Favors, Goodie Bag Stuffers for Kids 8-12, Spy Party Favors

This fine point marker is loaded with special ink that is only visible under UV light.

It includes a mini LED UV black light with batteries, so you can view your messages.

Children can play and learn secret agent skills with these pens, lay mystery adventures and writing clues for each other.

Write secret messages with your friends.

Perfect theme for a fun party favor, for drawing, secret message writing, currency checking, security marking.