Almost all educational systems still rely on traditional teaching methods: children must absorb huge uncorrelated amounts of information from various disciplines, multidisciplinary aspects are not developed, the fun factor is missing in most of the classes. Many children sometimes do not fully understand the presented theoretical concepts and their applicability in real life, so they lose interest and end up learning in a mechanical way. DigiMathArt is a teaching method designed to present Mathematics, Programming, and 3D modelling concepts in a multidisciplinary approach, in an attractive manner, combining theory and practice in a game-like 3D virtual environment. Its main principles are task-divided project-based approach, practicality, pre-theoretical learning, multidisciplinarity, 3D visualization. The method was used to build an ample content of lessons and exercises, covering a large part of the subjects corresponding to K-12 education, and its strength was proven through a pilot involving 100 children. Their positive feedback highlights the attractiveness of the method and its ability to teach theoretical concepts through practice.