The media has an increasingly important role in the psychological development of children, and new media are at the forefront of their influence: television, computers, the Internet and many electronic devices that have the primary purpose of accessing various media content. Most of the information about people, space and time that we don’t get first hand comes from the media. With the help of the media, we meet most of our entertainment needs. The use of electronic media is a major entertainment activity, not only for adolescents and adults, but also for younger children. The popularity of electronic media has increased significantly among young people today, especially with regard to computers and mobile media. At the same time, addictions to the Internet and smartphones, as well as gaming disorders, have gained in importance and become a major public health concern worldwide. The media attracts children because they are interesting, because certain life problems are presented from a different point of view, they identify with some of the characters viewed, but also because the media entertain and relax. A new generation of children in modern society is growing up with exposure to new media. According to the latest statistics, children make up more than 1/3 of the world's population, and in the age of globalization, media institutions control market forces. The media institution is also spreading global culture in an age of technological revolution. The effects of multimedia content are not always clearly visible, but they can have delayed effects. The rise of children’s use of technology and mass media has led to growing concerns about how it affects children’s brains, bodies and their socio-emotional, cognitive and physical development. Excessive use of the media and ignorance of the role and influence of the media can lead to a variety of problems, especially among the younger population, from the classic problem of addiction to self-isolation and the problem of aggression or violence among children encouraged by Internet use and absorption. Because children are exposed to the media from an early age, starting with parents ’spending habits, media behavior of friends and peers, the issue of protecting minors from harmful media content needs to be addressed in all these different settings and therefore requires a broad, multidisciplinary approach and commitment.