Come and Check Our Branding Solutions.This magical invisible ink pen will write your secret message. Once your secret message is written with this invisible ink pen wait a few seconds, then shine the blue light from the cover of the pen .Kids will love these spy pens. Kids love using this kind of pen to keep their secret and play detective spy games. Invisible pen brings you an amazing variety of fun activities. From Surprise birthday parties, to revealing a top secret message to their parents or grandparents. Pls check inventory and detailed info before placing your orders.