Type your secret message in the textbox. Or if you are looking for inspiration, you can also type one or more keywords in the 'Type keywords to search for phrases:' box. The website will try to find some phrases with these keywords. Copy the saying into the textbox for the sentence. When you type or copy the message, the website will generate the secret code.
The students need to decipher the code. To help them they also get in the bottom of the worksheet a code key table where they can find which symbol represent which letter.
As usual the solution as also provided in the worksheet.