In this must-have for fans of The Avengers, you can how to write and decipher hidden messages using:
- A message mask you can share with your friends for revealing secret messages
- A code wheel you and your friends can use to pass top-secret notes
- A special invisible ink pen along with the ink-revealing light pen
- A wax crayon and reveal spray bottle
- A red pen and red decoder lens
- A special 32-page book containing many secrets of the spy world