Cryptography

Learn Morse Code

Invent and Decode Secret Ciphers and Codes

Decipher a Secret Code

Write in Code

Make Your Own Secret Language

Mirror Write

Fold a Note

Use Constrained Writing to Send a Secret Message

Create Substitution Ciphers

Make an Invisible Ink Pen

Encode and Decode Using the Vigènere Cipher

Make a Code Wheel

Make a Secret Note

Decode a Caesar Box Code

Write in Your Diary in Secret Code

Write in Pigpen Code

Make Invisible Ink with Baking Soda