Children aged 0-3 years constitute 21% of all children population in Poland and more than 4% of the entire population of Poles. The "Young Children in Poland" report, therefore, describes the situation of every 25th citizen of Poland. The purpose of the report is to present the major findings of these areas of Polish families functioning and of the support systems that have potential impact on the welfare of children, and thus on their physical, mental and social development.