Features:
1. 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.
2. Safety: Harmless and tasteless ink, healthy toy for your kids! You can write anywhere: T-shirts, paper, skin. Permanent but washable!
3. Playing Detective Game: Kids love detective games with these secret pins. Invisible Pen brings you a variety of fun activities like treasure hunts.
4. 7 Different Colors: 7 pens in 7 different colors (red, yellow, green, black, blue, purple, rose). Battery contained and installed. Color Random
5. Note: Please do not use on a special surface such as: glass or smooth plastic film, etc.
Specification:
Material: Plastic
Size: about 13.5cm(Length)

Package List:
2/4/8/14x magic pen