ROKR Leonardo Da Vinci's Helicopter Mechanical 3D Puzzle CGL01

Product Specifications Number of pieces: 154 Assembly time: 3h Difficulty level: ★★★☆☆ Assembled size: 4.4*3.7*10"" Material: Plastic Recommended age group: 14+ Description The brilliant engineer and inventor Leonardo Da Vinci's sketched flying machines long before the technology or the materials to make this possible were invented. Today, ROKR brings this vision to life with the Leonardo da Vinci's Helicopter, a mechanical 3D puzzle that features double helix wings, a 6-cylinder radial engine, a 2-blade propeller, a steam engine core, and a conveyor belt-type drive crank, just like how the inventor drew it. This DIY model is the quintessential steampunk display straight from the Renaissance, lit up by a red-orange LED light in its furnace and blowing steam out of its chimney. Build all the models in the Industrial City Series and pay tribute to man's ingenuity and creativity. *Notes: Connectors are sold separately. You need to prepare the Type-C power cable by yourself."