NEWS – These pens would be a perfect gift for the budding spy or secret agent in your family. The pens are filled with ink that’s only visible under UV light. Luckily, the pens’ caps have a UV light source in them, so the message can be quickly decoded as soon as it’s passed over.
The set comes complete with two invisible-ink pens with UV-light caps, with batteries included. The Secret Message Invisible Ink Pens Pkg/2 is $5.99 at The Container Store.
Support The Gadgeteer:
The Gadgeteer’s main sources of revenue are advertising and affiliate links in articles like this one. That means we may receive a small commission on purchases at no cost to you.
