This thesis presents a methodical and scientifically grounded four-year training plan and program specifically designed for young water polo players aged 9 to 12. The proposed model is developed with a keen focus on the formative years, crucial in shaping a professional athlete's career. In these years it is important to emphasize the pedagogical aspect of coaching, ensuring that training methods are not only effective but also appropriate for the age group, fostering a positive and encouraging environment. The fundamental element of this approach lies in the strategic importance of defining clear objectives, which include not only the enhancement of physical abilities, technical skills, and tactical understanding but also the promotion of healthy mental development and sportsmanship. In each of the four years detailed in the program, the thesis outlines progressive training elements, emphasizing the importance of sequential skill development. It also emphasizes the essential role of regular evaluations in monitoring the athletes' progression. These assessments are pivotal not only in aligning the training with the athletes' growing abilities but also in aiding coaches to effectively form training groups. By organizing these groups based on biological rather than calendar age, the program ensures a more tailored and impactful training experience, one that is closely attuned to each athlete’s physical maturity and developmental needs. The ultimate goal of this thesis is to provide coaches with a scientifically and methodically structured guide to aid in the development of young water polo players, supporting their journey towards achieving high levels of training and competition.