Despite the long tradition in the social welfare field the number of children in Sweden who do not feel well has increased. This statement is based on reports from preschool teachers and includes young children (1-5 years old). The purpose of this article is to stress the present situation and what can be done to better work to raise healthy and secure children who also feel well. The aim is to discuss how the quality in preschool affects children’s wellbeing? Quality does not only mean happy children and satisfied parents but also competent staff with positive attitudes and systematic quality work. It appears from research that enough time for pedagogical planning and follow-up, small child groups, high teacher density and low staff turnover are also essential. The results also show that the most critical aspects for supporting children’s health and development are quality improvements based on equality, an efficient value system, a useful curriculum, scientifically based teacher training and a school/preschool for all.