An innovative educational kit designed to introduce students to basic engineering principles and the work of simple machines in an accessible, practical and fascinating way.By designing and experimenting children develop technical thinking, logic and problem solving skills while creating different mechanical models and structures.The kit includes the latest elements of the Polydron system, including gears and specialized connections that allow the construction of operating mechanisms such as engines, rollers and other engineering models. Working with them helps students to better understand the relationship between mathematics, physics and engineering through practical examples and real applications.Detailed work cards with instructions for different structures are included to facilitate self-employment and promote the research approach to learning.The kit is fully compatible with the original systems Polydron and Frameworks, allowing expansion of the design and combination capabilities with already available kits.Polydron Main Engineer is a valuable resource for design and technology classes, STEM training and practical activities by stimulating creativity, spatial thinking and interest in engineering sciences.Number of parts: 109.