Today more than ever, pre-school children are exposed to the media and its influence. Whether media has a positive or negative impact on their future development and behavior depends on the type of media content they consume and the amount of time they spend with media each day. Media can stimulate children's creativity and imagination, improve their learning ability, social skills and tolerance. However, media use can also lead to isolation, loss of interest in play and sports, loss of time spent with their parents and friends and thus a feeling of loneliness, it can lead to violent behavior, sleep problems and even addictive behavior. The potential positive and negative effects of media use are directly related to the way it is used by children. Television is still the most popular and widely used type of media among preschool children, although children today are beginning to use cell phones, tablets and laptops at early stages of their lives, through which they also have access to media content. Parents play the most important role in their children's media education, but nursery school teachers also play a very important role. As soon as the child comes into contact with the media, parents should begin to educate them about media consumption and media literacy. For this to succeed, however, they should also be trained in this specific area.