The essence of this work is a presentation of a procedure of traditional fostering and adaptation of a little girl on the specific example. Her psychophysical development is described through the period of eighteen months, her relation toward her foster-family, brother, peers form kindergarten, such as the influence of the meeting with her biological parents. These research shows the influence of institutions and the surrounding on the individual, his/her emotional, cognitive, physical and social development. A solution and possibilities of fostering of a little girl is brought according the best interest of a child. The range of institutions and experts who influence prosocial behaviour with children is wide, and the individuality of an individual is the imperative which leads them through the process of successful adaptation. We recognize how foster care has changed throughout the history and according to what degree the influence has been performed on the legislation, institutions and civic society. The question about the quality care for a child appeared quite early, which can be seen in numerous documents which deal with such issues, and has been widespread today. The convention about the children rights has become the basis of almost every national legislation and valuable basis for treating children which with its contents proves the importance of proper development and care about the child as the most endangered member of population. Fostering is based on certain principles defined by the Law on Foster Care (Law on Foster Care, a. 3, N, N 90/11, 78/12) such are family surrounding, maintaining social connections, involvements of users and their best interests. The support of the surrounding, community and experts have big influence in socialization and development of individuals just by which educational institutions besides socialization develop personality with a child. Hours and hours spent in the institution leave mark even on this work, and gradually describe and follow social interaction of an individual and a peer in a group.