The contents in augmented reality, associated with the book "Otto l'Aquilotto, children and the digital world" published by Punto Otto edizioni, contain Otto l'Aquilotto®'s advice to teach children self-regulating behaviors in the use of digital devices to protect the visual and postural system. Otto also suggests games, interacts and encourages physical and visual experiences. To view the contents of the application and play with Otto, it is necessary to frame the QRCodes in the book. Otto l'aquilotto® is a registered trademark in the educational field, the result of years of study and research. Punto Otto S.r.l. is the official reseller of all products associated with it.