While I doubt the super serious stiff in this DIY video is actually a super spy, he does have the DIY know-how necessary to hack apart an inkjet printer and make it into an invisible ink-spitting ...

Have mini detectives, secret agents, or superheroes at home? Keep your creative kids entertained for hours with this fun DIY invisible ink recipe that uses ingredients straight from the kitchen! There ...

Here’s a fun way for junior spies to write covert messages to friends and family. This DIY invisible ink lesson is adapted from The James Dyson Foundation science ...

A letter from the Revolutionary War with lines written in invisible ink. Credit: Wikimedia Commons Last year, the US Central Intelligence Agency released documents detailing recipes for invisible ink ...