The purpose of the study, "Living in Two Worlds" is to try to find out how the professionals in social work reasoning and thinking about children 0-3 years living alternate residence and how children 0-3 years are affected by form of housing . Questions are how they professional reasons and think about the type of housing, what advantages and disadvantages they consider are and the conditions under the professional must be satisfied that the child will not get hurt. Study is a qualitative study using semi-structured interviews. The theory that the study is based on the attachment theory explaining the relational processes that occurs between the child and its care person.      The results of this study show that if the parents are in great conflict with each other is important for the child cope with the alternating form of housing well or not. Based on the child's psychological development at age 0-3 years is not recommended alternate residence valid extension. Continuity, predictability and good cooperation between the parents is highly valued by those interviewed. It is evident in the completed interviews both pros and cons of alternate residence.