Features: Discover the excitement of hands on learning with this mechanical marble runing gear model set, vividly showcasing physics principles through interactive assembly for engaging educational experience. Crafted from wood and precise electronic components, this hands on assembly wooden mechanical marble tracking gear model features easy assembly design that ensures safety and ease of use. Perfect for students, teachers, and families, this educational science set fosters creativity, and STEM learning in fun, accessible way for all ages. Ideal for classroom demonstrations, homeschooling, or group activities, it transforms complex mechanics into tangible, enjoyable experiments that inspires curiosity. As versatile physics educational model, it not only entertains but also deepens understanding of gear principles and motion, making science concepts come alive effortlessly. Specifications: Component: Wood, Electronic Components Color: Wood Color Size: Approx. 15.5x12.5x10.5cm/6.1x4.92x4.13in Weight: Approx. 211g Package Includes: 1Set Hands on Assembly Wooden Mechanical Marble Runing Gear Model note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color