With the secret pen from Dino World, you can write down dinosaur-safe secret messages. The invisible ink of the secret pen only becomes visible when it is illuminated with the UV light integrated in the topper. Batteries included, but not replaceable.
With the secret pen from Dino World, you can write down dinosaur-safe secret messages. The invisible ink of the secret pen only becomes visible when it is illuminated with the UV light integrated in the topper. Batteries included, but not replaceable.