2 Style ] 32 Pack Invisible Ink Pen with UV Black Light Secret Spy Pens Magic Disappearing Ink Markers Classroom Supplies Kids Party Favors Back To School Gift for Boys Girls Goodie Bags Stuffers

The invisible ink pens are a fun and engaging product for kids to play with. The FAQ section offers a lot of information about the pens such as the ink lasting for over a year if kept well, and being non-toxic and skin-safe. There are 2 types of pens in this set, both of which require the cap to be taken off to use, and have a button or slider to activate the light. Some of the Cons mentioned in the reviews are that the pens come crammed in a box and not individually wrapped, some of the pens did not work or light up, and some of the ink tips were hard. However, despite these issues, those that do work are enjoyable for both kids and adults.