All you need to keep secret messages and notes the secret spy message kit allows you to write notes in invisible ink that only you can reveal each kit includes a top secret diary that comes with a padlock and keys two invisible ink pens and a uv torch write your message and it cant be seen by the naked eye but shine the uv torch and your message is revealedr r secret spy message kitwrite messages in invisible ink and reveal with a uv torchkit includes 1 x top secret note book padlock an