Cartoons entertain kids, and in modern times they expanded from television to YouTube and similar internet platforms making them more accessible to children. The goal of this paper is to determine if cartoons available on YouTube are sending desirable or undesirable messages. Therefore, the purpose of the research is to analyze and categorize educational messages which children are exposed to while watching any of the selected cartoons on YouTube. The research carried out in this final paper contributes to the study of educational messages transmitted by cartoons available on YouTube and encouraging parents to think carefully about the content their children are watching. Theoretical part of the paper describes the definition and history of a cartoon film, children's understanding of cartoons, children's communication and the reflection of cartoons on children's behavior, and the YouTube platform is also presented. In the review section, other author's research on cartoons and the messages that those cartoons convey are analyzed. Afterwards, ten cartoons available on YouTube have been chosen for analysis depending on the frequency of watching them. The contents of cartoons and their messages that are considered educationally desirable or undesirable are shown in the table. Then each cartoon film, along with the messages it transmits, is displayed individually. It is evident that there are cartoons that convey educationally desirable messages with their content. They are educational and encourage the child's intellectual and emotional development. Cartoons that are assessed to transmit educationally undesirable messages show violence, aggression, and distort the child's image of reality. At the end of the paper there are recommendations for parents who point to the importance of their role in guiding children to watching cartoons with desirable educational messages. The results of the analysis of ten selected cartoons available on YouTube showed that four of them were educationally desirable and five had educationally undesirable messages. There is also a cartoon film that sends out both desirable and unwanted messages to children.