The aim of this thesis is to show what students do in their free time, which activities and to what extent based on a review of the previous researches and comprehension of the free time of children and youth, and to discover the views and interests of the third and fourth graders of the primary school Runović regarding the use of free time. For the purposes of this study there is an included sample of 41 students of the third and fourth grade of primary school Runović. Method of the questionnaire examined their attitudes and interests regarding the use of free time, and examined the share of physical activity in their free time. The results showed that most students said they practice sports as a way of spending leisure time. Even 100% of boys play sports in their spare time, mainly football, while the 76.47% of girls play sports in their free time, the most common is the school of sports. In addition to sport activities, students attend extracurricular activities. Their answers contained all the extracurricular activities that the school offers, and most students attend extracurricular activity "Little ecologists". On the other hand, the percentages of sedentary activities are high, 50% of boys spend 3 and more hours daily watching TV or working on a computer. In addition, awareness of the importance of sport is emphasized because all respondents answered that sport matters. The boys responded that the practice of sport is important for success in sports, and girls that sport affects the health. Most of the students stressed the importance of spending time in the fresh air as opposed to sedentary lifestyle. Most respondents would like to play sports in the future.