Spy's handle "Cosmos", pen and notebook

There are ordinary pens with which we are all used to working. But what if the pen could do more than just write? A pen with invisible ink will turn an ordinary letter into an exciting game of spies! The child will introduce himself to a secret agent, write a secret message, which manifests itself only under an ultraviolet light.

• The flashlight in the pen works from 3 batteries of the LR41 size (included).
• The kit includes a notebook, suitable for recording all secret messages. With it, each mission will become even more exciting!
• made of high-quality plastic.

take off the cap and write something on a sheet of paper, and then shine with a flashlight, and then shine The text will appear. You can leave invisible messages for friends - like a real spy!