Type your message in the textbox. You can also type in some keywords, then you the website will try to find some sayings with these keywords. Copy the saying into the textbox for the sentence. When you type or copy the message, the website will encrypt the text into the secret code.
The students need to decipher the code. To help them they also get an code key where they can find which symbol represent which letter.
As usual the solution as also provided in the worksheet.