ROKR - The Tractor Mechanical Gear is extremely well designed, with very tight tolerances and good machining model set. The interlocking mechanisms are pretty intuitive and not overly tight. Assembling without glue and chemicals on details that are already cut and ready to assemble. This is a perfect mechanical toy for an older child who appreciates the beauty of gravity and gears Explore Engineering: Tractor Mechanical Gears can be an educational toy as it inspires your child to learn more about classical physics and historic vehicle No batteries required: Powered simply by spring, Tractor Mechanical Gears prove that it can run fast compared to other batteries-powered toys. Product Details: Finished Product Dimension: 238 x 118 x 140mm Box Dimension: 357 x 235 x 46mm Materials: Wood Wood Pieces: 136pcs Weight: 600g Recommended Age: 12+
