Kids Have Fun
You can use these invisible pens on many different things and create a lot of fun, such as encrypting the wedding invitations, identifying your personal valuables or even using the UV light to check dollar bills.
Children can write anywhere and you can not see it until they shine the pen’s light over where they wrote. They will think they are secret agents with these pens. Fun for sure and they can play with these all day long!
Built-in UV Light
It is a great idea to have the UV light installed in the cap so you do not need to buy a spare light. It comes everything in it so your children and their friends can instantly play with these and see the secret messages they write!