Invisible Ink Pen for kids 16Pcs: Spy Pens with UV Light Party Favors - School Classroom Students Prizes - Magic Gifts Birthday Goodie Valentines Black Markers Halloween Easter Day Christmas Gift

Ordered these just for my 7 yr old son to play with. They are great quality. He loved them so much that I purchased more to use as party favors in his party favor bags at his party. The little black light on the pen lasts a very long time and the pens write wonderfully. So cool. We right messages to each other on his walls and then look for them with the light. The ink does not show up at all or stain the walls unless shining a black light on it.

I really enjoyed getting this invisible ink pen in another goody bag that I knew I had to get it for my daughter's party favor bag! It's such a great product to have in your purse at the ready when the inevitable happens and you're stuck with a bored child. Because the ink is invisible, it doesn't make a mess and it's an all around amusing product to have at the ready. This is a great addition to any party favor bag!

These pens work very well and are fun to use. The tip of the pen is smooth and easy to write with. The light to show what you wrote works fine. These are fun for kids and adults. Plus, this has alot of pens in a pack.

These blue light pens were SUCH a hit for my 10 year olds party! They lasted a good long while too!

Purchased for Elementary School Science units on light spectrum and for the little ones, germs. Majority of the pen lights worked; all of the pen ink worked. The Kindergarten and Jr.K. students loved walking around the classroom look for the "germs" they spread from the "Glo Germ" powder.

My 5 kids love these pens but sadly they took them to school and the teacher took them away from them n did not return them! Will buy more to keep at home!!! DO NOT TAKE THESE TO YOUR SCHOOL!

My daughters used these pens as a birthday giveaway at their escape room party! They were so fun and all the kids enjoyed them. They are still sharing notes back-and-forth using these now that they are back in school.

These were to be used for a game of Glow in the Dark Clue... but the light emitted from them is so little, you have to literally hold the pen like less than a half an inch from the writing to see anything. The picture in the ad makes it seem like the light is big. It's not; it's very small and honestly, I wish I could return them, but my daughter lost some of the pens and I could not.