Be a super spy with this set of 2 secret writing pens. Jot down secret messages that only the other person with the special pen will be able to read. Each pen writes in a special ink that is only visible when the secret lamp inside the pen is shone over it. This is a great gift for children that's sure to provide hours of fun.
Each pen uses 3 LR41 Lithium batteries which can be replaced by unscrewing the pen lid, batteries included. Suitable for children 3 years and up.