This paper deals with the impact of computer games on children from third to sixth grade of primary school. It deals with the development of computer games from their beginnings until today, the types of computer games, the pros and cons of playing computer games, studies that address the target age group, and the impact of the COVID-19 pandemic on children's attitudes towards computer games. For the needs of the work, our own research was conducted on 145 children, for whom parents filled out survey questions. It confirmed four hypotheses set before the start of the study, while one did not. It was confirmed that children most often play online computer games with friends from the real world, that they play computer games for fun or for friends, that playing computer games negatively affects children's behavior and that children spent more time playing computer games during the COVID-19 pandemic. The hypothesis that children would rather play computer games than play outside with friends has not been confirmed, as more parents have given the opposite answer. It was concluded that playing computer games has an impact on children in our age group. This impact can be either positive or negative, all depending on the amount of time children spend playing, what type of games they play, and how much parents participate in children’s decisions about computer games and control their use.