Fine point marker, is loaded with special ink that is only visible under UV light.
It includes a mini LED UV black light with batteries, so you can view your messages.
Lamp holder is a purple yanchao lights, write can't see A photo with purple lights will be displayed
Students can use the pen mark important information in the text books, in order to more efficient to complete the review your lessons.
Description:
Invisible Writing: Send invisible messages and then make them visible again when you light the messages with UV light. This allows secret messages to be sent unrecognized.
Safety: Harmless and tasteless ink, healthy toy for your kids! You can write anywhere: T-shirts, paper, skin. Permanent but washable!
Playing Detective Game: Kids love detective games with these secret pins. Invisible Pen brings you a variety of fun activities like treasure hunts.
