INTRODUCTION The validity of the problem. Mental, physical, and social health is vitally important, closely interrelated and interdependent factors of human well being. The perception of this mutual relationship allows understanding the crucial role of mental health on the development of the general well being of society and country. Children are important citizens of tomorrow. Their development, experience, ability to act and take decisions is a precondition for further advance, quality of life, and welfare. Unfortunately, the majority of the global community does not regard mental health and disorders as important as physical health. Generally these problems are being ignored and neglected (WHO, 2003). The general prevalence of the children‘s mental and behavioural disorders was investigated by many advanced countries (Germany, Japan, Switzerland, the USA) and by some developing countries (Ethiopia, India). According to the findings of the scientists (Tadesse, 1999; Steinhausen, 1998; Shaffer, 1996 et al.) 10–20% of children experience one or a few mental or behavioural problems. Lithuania is not an exception: 24.6% of the children complain regarding their mental health. Mental health centres have registered 9495 children under 18 being treated for mental disorders (State Mental Health Centre, 2003). Children with various levels of mental retardation (42.3%), behavioural and emotional (28.2%), and psychological development disorders (9.8%) constitute the majority of the... [to full text]