Presented the theoretical position of becoming the subject of children’s age and options manifestations boundaries of subjectivity. It is shown that the parent-child relationship may have a fundamental role to form the boundaries of subjectivity. The results of an empirical study carried out on a sample of preschool children (n = 65, 4–6 years) and their parents (n = 65, range 25–46 years) with the use of diagnostic tools: questionnaires child-parent relationships, methods of observation and expertise.