Recently, my girlfriend’s niece turned 5 years old and as such, was invited to become a member of the Puzzle Keepers of Palau.
The puzzle in this case takes the form of a book (“Alice’s Birthday”) with hidden messages, revealed by looking at the illustrations through a red lens. Solving the puzzle requires tearing/cutting through the last page of the book to reveal a lock, with combination being revealed in the secret messages. Once the lock is off, a panel can be removed to reveal a key, which in turn unlocks a briefcase full of treasure.
For a full album of the puzzle process, head here.