Since the invention of writing, people have wanted to send others messages no one else could read. Methods range from the simple (sdrawkcab segassem gnitirw) to the super sophisticated, those uncrackable by any modern computer. We’ll find various ways of scrambling words, move on to substitution ciphers, transposition ciphers, and finish off with codes. We’ll also have fun trying to create our own secret messages to pass on to others!