Start the kids off on possibly our simplest code challenge. This page includes an explanation and an example, as well as three coded messages for them to attempt themselves.
This 4-page pdf file combines our 2 pages of "reverse the words" code challenges for the kids to solve, a page to help them set their own secret messages, and a solutions page.
Once the kids have solved our reverse the word code challenges, the next step is to try setting a secret message of their own for their friends to solve. Here is just the printable to help with that!