Aodebiao Invisible Ink Pen 7Pcs with LED Magic Marker for Secret Messages, Writing Information for Birthdays, Easter,Gifts

Set of 7 Invisible Pen Maker Kids Message Pen with Built in Light
Feature:
Color:, blue, red, green,,, yellow
Ink properties: Invisible ink
Style:
Specifications: 13.4cm
Use the ink pen to write words or messages, the writing will disappear when the ink is dry.
when you the light to them, the behind reveals
For saving batteries, plug the write card tag back to the pen when you don't use the light
Please don't the light directly to eyes
Package Content:
7 pens