The Dangerous Book for Boys.

This is the third boy (and one girl!) who has been enchanted by this book. It's literally quite brilliant and has suited today perfectly.

Bike ride, dog walk, a trip to the bowling alley (the most old school one known to man) and hours and hours of secret code making and breaking.

In that spirit, I offer you "Ibqqz Tvoebz!" No prizes. It's like the first level of secret code making.