Zlatko Grgić was a Croatian film director, screenwriter, animator, cartoonist and cartoon drawer who, based on the children's film "The Inventor of Shoes" (hrv. Izumitelj cipela), made the most commercial series of the Zagreb film "Professor Balthazar". Professor Balthazar was the first large series of Zagreb films, dedicated to children and in 1967 Zlatko Grgić and Borivoje Dovniković began working on the short film "The Inventor of Shoes", a pilot episode of the first group of episodes. Boris Kolar and Ante Zaninović participated in the group as screenwriters, directors, cartoonists and animators together with Zlatko Grgić and after two years of work, they managed to complete the first series. The animated film "Professor Balthazar" consists of four series with a total of 59 episodes. As the media in today’s world has become an important factor in the socialization of children and youth, animated films have become something without which it is impossible to imagine childhood. What children love the most is watching animated films for fun as well as for educational purposes. The media helps children growing up as transmitters of knowledge, ethical and moral orientation and role models. The environment is one of the important factors in shaping a child's opinion, attitudes, personality and developing self-criticism, so it is important that it also participates in the child's use of the media and the choice of media content. Frequent use of the media can influence children's behavior towards parents, educators, teachers, but also passers-by in their lives. Therefore, it is very important to see what message these animated films actually carry.