Spy XXinvisible Ink Pen, Black, 10126,

I bought two of these, one for my 9 year old daughter, and one for my 7 year old son for their Christmas stockings. Unfortunately, one was completely dry when we opened it. However, I contacted the seller and in less then 48 hours we had a new one which works great! So far they've had a lot of of fun with them, writing secret messages. Anything that keeps them off the iPads is a successful toy in my opinion and these do it!

Used this for my in-home escape room puzzles. It is still working just fine after 6 months light use. Also bought a small UV flashlight for the escapers to use. The tiny light on the back of the pen does let you see what you've written, but its beam is narrow and a bit weak for use in the escape room.

Kids are extremely happy!!!

Génial, il était ravi!

its cool