Knowing the characteristics of the development of preschool children is very important in order to be able to properly influence its development. Every child has its own individual rhythm of development. By knowing the characteristics of child development we will know what to support, what to encourage and what to expect at a certain age of a child. Movement is one of the basic needs of the human organism, as well as it is of every child. Normal physical, emotional and social development of a child is not possible without the sufficient amount of movement. The motor development of a child cannot be seen isolated, but must be observed through harmonious physical, motor, emotional and cognitive development. This paper describes the characteristics of the growth and development of pre-school children and motor skills, including endurance. Motor development of preschool children is also described, as well as the importance of physical movement at an early age. In order to determine the developmental level of endurance at six-year-olds, the measurement was performed with the help of the test Run Test for 60 seconds and 90 seconds. The measurement took place three days in a row at the kindergarten "Ribica" in Žabnik, in Međimurje County. Thirty children from the older educational group participated in this process. By testing the reliability of the test, the F90 test was satisfactory and could be used for further research, unlike the F60 test which was not valid.