Definition by adults of the leading type of activity, as the most important condition in the mental development of young children

This article indicates the importance of taking into account leading activities in creating conditions for the mental development of children. A theoretical analysis of the study showed that early age is the basis for the further development of the child. An adult should be able to regulate the cognitive actions of children. If the beginning of cognition is perception, but it is the manipulation of objects that is considered a condition for the development of thinking and speech. Actions with objects in a joint activity with an adult help the child gain a deeper knowledge of reality. As studies show, in objective actions, the child’s speech is stimulated. Speech development at an early age is the basis of the child’s mental development.