This article synthesises an investigation of the making of a didactic programme as a consequence of the excess of consumption of audiovisual messages and the non critical and non-thoughtful attitude the youngsters have towards it. As an answer to this problem, the authors have produced a didactical programme about cinema and its language, the main purpose of which is to verify how knowledge, habits and attitudes of children may be modified if we plan, in the classroom, a way to deal with critical thinking, contents and cinematographic language.