Invisible-Ink Pen Marker With UV Light
This Invisible-ink pen from SyPen is an excellent gift to consider for your beloved kids or playful adults who are into novelty, unusual products. With it, the kids can write or draw secret messages, maps, or plans; after finishing, they need to wait seconds and use the ultraviolet blue light on the pen’s cover so that the secrets appear. Kids feel excited when playing secret games and turning into spies who have to keep their messages hidden. And with the invisible pen, things will be more fun. It comes in a 12-pack of barrels in various colors, but the ink is clear in all of them.