Christmas Secret Code

For grown-ups

Each sheet hides a joke or a short message behind a code, with the key printed at the top. Easy swaps letters for shapes and gives the whole key away, so it is really a matching exercise for a child who has just learned the alphabet. Medium and Hard shift every letter along by a number the sheet tells you. Super does not say what the number is, so the only way through is to try one, see that it reads as nonsense, and try the next: a first taste of solving something by testing a guess. The messages are jokes, which is what makes a child finish the last six letters.