The National Curriculum for Early Childhood Education and Care describes the importance of collecting different forms of documentation for the purpose of observing and understanding a child, supporting its development and aligning educational work with the individual diversity of children. In accordance with children's needs, opportunities, interests and knowledge, educators also prepare the spatial - material and social environment from which it follows that documenting is the basis for shaping the kindergarten curriculum. The National Curriculum for Early Childhood Education and Care also cites an individual children's portfolio as one of the possible forms of documentation. Children's portfolios are a form of documenting children's growth and development from nursery to primary school and are made for each child individually. They contain many different materials that provide educators with information about the child: photographs of various events and children in activities, child's artwork, written notes of the child and the educator (child's statements, questionnaires, beginnings of writing, child's stories or retellings, anecdotal notes), and notes, texts or confirmations regarding group activities. The theoretical part of the paper will describe in more detail the importance and role of children's portfolios in the educational process and their possibilities and benefits for all participants of the educational process: children, parents and educators. In the empirical part of the paper, the attitudes of educators who create and use children's portfolios with those who do not make and use them will be compared on a total sample of 570 respondents. The structure of the group of educators who develop and use children's portfolios will be analyzed in more detail. Furthermore, whether their preferences on children's portfolios are in correlation with their qualifications, internships, the number of children enrolled in a group, and the type and structure of the kindergarten group which they work with will also be examined.