Uniclife 3 Pcs Invisible Ink Pen with 3 Pcs UV LED Keychain Flashlight, Spy Pen, Disappearing Ink Magic Pen for Secret Notes, Magic Spy Marker with Purple Light for Christmas Halloween Holiday Present

Works just like advertised. The kids and I love writing eachother secret messages.

These are fantastic I write bible verses all over my walls with this

These worked well to number my ivory wedding RSVPs. And I actually got to use them once as someone did send back an RSVP without a name! I tested these on several types of paper and discovered that they don’t work as well on darker papers, the markings are faint, but still visible if you are looking or paying attention. But on light paper, you couldn’t tell at all!

At first the blue pen wouldn't work under the black light so I shook it and tried again and it worked after that. I used this product to make a Tomb Raider themed card with "secret runes" to solve. Worked out really nicely. I used specialty parchment and the ink didn't bleed out too much and provided sufficient color without being too much. They dried quickly and worked quickly.

They are not nearly as bright as as i thought they should be be

Kids loved these!!!

These are so much better than the pens with the big light on the end of them. They are very inconspicuous and they write in each represented color. Lots of fun for kids and adults. The lights can hang on a keychain. They are exactly like the lights that show blue light filter on glasses. It’s difficult to see the blue a yellow through my camera phone but believe me they are true to color.

These are great! We used them to label the back of each wedding RSVP with a number so we could figure out who it was from - in case of hard to read lettering and/or they don’t say who it is. Once the ink dries I couldn’t even see it! And with the light provided it was easy to see! Highly recommend if you want an invisible ink pen that’s at a great price!!