Colouring in has been shown to be beneficial for all - namely for its de-stressing power. It slows down breathing, promotes a relaxed state, and also counters feelings of anxiety. Colour in Peace Postcards is a collection of 20 detachable postcards, with messages of peace, to colour in and send to your friends - or to keep and pin on your wall. Using popular images taken from the book Colour in Peace: A Reflective Journey illustrated by James Newman Grey, Lion Books.