Dominate the construction world with geometry! Utilizing the distinctive Chinese Mortise & Tenon Cube and 9 geometric pieces for a Tangram-style creative challenge. This set focuses on the creative potential of the square block, allowing children to combine 6 small square units to create 6 different mighty construction vehicles. The reliable M&T structure eliminates frustrating collapses, ensuring immersive play. Includes rich educational content and a special Mystery Letter designed to boost the child's confidence.