Tegeme 10 Pcs Invisible Ink Pen with Blacklight Flashlight Favor, Black

Works very well When putting in a battery Light has a weight to it and Last very long The ink does not runs or smudge Dries very easy Stay on very long

Works well!

These feel cheap, but work effectively. The blacklight illumination is strong and steady, and the invisible ink from the included markers stand out instantly under the blacklight. All in all a good value, especially if you are hosting an interactive event (such as a scavenger hunt, Spy-themed party, escape room, etc.) where you need to hide secret messages!

I bought this set to make an indoor game for my grandkids. We looked up coloring page images and printed them out like oversized playing cards, then traced those images onto blank cards with the invisible ink. My grandson held the light so my granddaughter and I could see what we were tracing. We then hung up the invisible images around the house and mixed the other cards at ‘home base’. We had fun looking for the image in a race with the flashlights. This set was perfect, and they still play the game at their house.

Bought this to use in a homemade escape room. The pens worked great. Everything was visible under a weak black light. Good value.

Great for birthday party prizes. Well received

I ordered several of these to use with breakout boxes in my classroom. In each pack, I have one flashlight that not only doesn’t work but gets extremely hot—so I’m assuming it has some kind of short circuit. The other flashlights in each pack work fine. Regardless, when only some of the product works, it doesn’t make for as good a deal!

Work great, I used them for a kids lesson at church and an escape room