ROKR Leonardo Da Vinci's Helicopter Mechanical 3D Puzzle Building Model Kits for Adult Gift

Leonardo Da Vinci's Helicopter Vision Brought to Life - Experience genius engineering with this 3D helicopter model inspired by Leonardo's original 15th-century flying machine sketches, featuring authentic double helix wings and mechanical details. Working Mechanical Systems - Discover intricate moving parts including a 6-cylinder radial engine, 2-blade propeller, and conveyor belt drive crank that demonstrate fundamental engineering principles in action. Expandable Industrial City - Connect with other Industrial City series models through wireless receivers or electric track systems to create synchronized mechanical displays that work together.