Printable Secret Agent / Spy party treasure hunt. I love this because it comes with everything you need to set up the hunt, even decoder wheels. Plus, you can hide the clues anywhere and the hunt will still lead from one clue to the next.
8 Awesome DIY Secret Codes for Kids - Type your own Top Secret message into the template and it will automatically encrypt to match the Cipher! Great as Spy Party games / activities, for playdates or even in the school classroom as code breaking games $6.50 via SIMONEmadeit.com