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

My elementary aged kids love these! The light makes the writing vibrant. Always works great as long as the cap is all the way on.

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 invisible pens, work great, and are so fun to use. My grandchildren, love them every single one worked and were amazing.

Use to secretly make bottles. And they worked!!!!! Just give a few seconds to dry

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.

Los compré para las goodie bags del cumpleaños de mi hija y están increíbles, funcionan muy bien.

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.

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.