Educators of preschool children often encounter children who have difficulty performing simple actions related to self-care. So many children have difficulties with tying shoelaces, buttoning buttons, pouring water from a pitcher into a glass, and the like. Maria Montessori has developed didactic material that helps children develop the aforementioned skills. In this work, the emphasis is on practical life exercises as a development area of Montessori pedagogy. For the purposes of this thesis, an action research was carried out with the aim of training children to independently dress and take off clothes and to unfasten and fasten different buckles and buttons. The research was conducted in the Sunčica Kindergarten in Osijek on a sample of 25 children aged five and six. The results of the initial testing showed that the children are more independent than expected. The final test showed how the children mastered unfastening and fastening various patents. They had the most difficulty with fastening the belt and tying the laces. Two children with disabilities achieved almost the same results as most children with normal development, while the girl with Down's syndrome mastered fastening only one patent. While practicing the skills of buttoning and unbuttoning the buttons, the children strengthened their social competences and learned patience. The disadvantages of this research were the length of time, the impossibility of finding an adequate space and the withdrawal of participants. When talking about the results of action research, they cannot be generalized for other participants, since researchers can certainly adopt certain methods of data collection and use the methodology of this research. Action research in preschool institutions would certainly raise the quality of early and preschool education to a higher level in the future.