this book is really great, my daughter has problems due to stress concentrations (she scratches, gets angry, abandoned when she can not do something or is upset), thanks to this method, it arrives itself to focus, at first I reminded him to "frog" and now she does it by itself. It is important not to hesitate and buy this book which allows us to better understand our children and we even allow to have moments of relaxation and complicity with our children while helping to refocus on themselves !! !