Modern lifestyle significantly differs from the former, traditional lifestyle. Due to the progress of technology and science, lifestyle tempo has become faster and people are becoming overwhelmed with obligations in order to secure safer future for themselves and their children, which causes the amount of free time to decrease. All of these factors influence the way children spend their free time. Children today mostly do not spend their free time in a quality fashion, by doing physical activities, but they are rather being seduced by sedentary lifestyle, that does not require any muscle exertion. Lack of activity in children and young people as well as remaining in closed rooms have negatively influenced the anthropological status and health status of the individual in general. Seeing that free time of children and young people has always been attracting a lot of attention from the experts, many researches on this topic have been conducted. Aim of this thesis is to discover what pupils do in their free time, to which extent they do physical activities in comparison to other types of activities, if they recognize the value of doing physical activities and how they feel about the number of classes of physical education in lower grades. Research has been conducted on a sample of 188 pupils; 95 male pupils and 93 female pupils of all 6 elementary schools in Vukovar. Research results reveal that pupils of the 4th grades of elementary schools mostly spend their free time doing sports, which is followed by usage of modern technologies and watching TV. Most often, children spend approximately an hour in front of the TV or a computer, while 39% of them spend between 2 and 3 hours a day, which is more than recommended. It is important to emphasize a positive fact that the biggest number of children chooses one of the sport activities as an extracurricular activity, which exceeds the other options in percentage. In it also important to state that a significantly bigger number of boys choose sport as an extracurricular activity, in comparison to girls. The biggest number of children does sport actively in their free time; boys mostly choose football and basketball and girls are more inclined to dancing, roller-skating and handball. In terms of frequency of doing physical activities in their free time, it has been revealed that the biggest number of pupils is active on a daily basis, but it needs to be stressed that the boys are significantly more active than the girls. Extremely positive was the fact that, regardless of gender, all the pupils perceive the significance of doing sports in a positive manner. Pupils have proven that they understand the influence of sports on their health by selecting health as the most important reason of doing sports. They also feel that the number of classes of physical education is inadequate and that it should be implemented into their schedules on a daily basis.