This research paper discusses the impact of kinesiology activities on the development of motor skills of preschool children, whether children who play sports outside of kindergarten have better motor skills results. Also, the paper talks about importance of children playing sports, what benefits sport have for children and how it contributes to their development. Physical inactivity is a big problem today because it is the fourth leading cause of death in the world. Insufficient physical activity leads to an increasing number of obese children in the world, and a large percentage of children are less active than the recommended hour a day. This is a largely due to the development of technology, which offers a variety of activities that do not require movement. Physical activity should be an integral and necessary part of children’s everyday lives, and therefore an indispensable part of the education system, because it greatly contributes to physical and mental health and a better quality of life. The survey was conducted on a sample of 44 children from kindergarten in Samobor. Tests were used to assess motor skills in preschool children. Also, a questionnaire was used for the parents of the children, with which we wanted to examine the sports activity of the children outside the kindergarten, and how the children spend their free time. Data analysis showed that children who play sports have better results in terms of mobility/flexibility, while active playing sports has no effect on other motor skills. A T-Test with regard to gender proved that there was no difference in any variable.