Discover the engineering marvel of this Tractor 3D Wooden Puzzle—a 135-piece mechanical masterpiece that brings farm life to your workbench! Crafted from quality wood with intricate gears, this replica tractor actually runs smoothly when powered by its spring mechanism. Perfect for puzzle enthusiasts and engineering buffs alike, it's a satisfying 4-hour build that challenges your problem-solving skills (difficulty level: ⭐⭐⭐). Once assembled, you'll have a charming 23.8cm × 11.8cm × 14cm working model that's as fun to operate as it is to construct. Get your hands turning those gears and experience the joy of mechanical ingenuity!