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.You may also like G28 Advanced Portable Game Player Console 4.3inch Display for Smooth Gaming.