Add a new twist to help your child learn to read and spell. Let them use the Secret Decoder to encrypt all of their secret messages. Kids: Leave special notes around the house for your mom and dad to find! Secret Decoders come in sets of two, so you can give one to your best friend.
The secret decoder disk uses a Caesar Cipher to encrypt and decrypt your secret messages. This is the same technique Julias Caesar used to send important messages to his armies.
Made in USA