Tilt-angle Tourbillon DIY 3D Printed Toy Features:.Model Display: This 3D simulated tourbillon model makes a splendid gift, home decor & office ornament for science and machinery enthusiasts..Authentic Details: Including a metal spring with accurate & realistic details, the lifelike model needs to be assembled, which helps teach and inspire toddlers and kids for better family relations..Dynamic Simulation: The product is pre-painted. It is able to simulate the operation according to the principle of mechanical transmission .Note: Hand-on ability is required for the model made of premium PLA plastic. Layer lines that make the materials overlap each other or cause the wiredrawing of the plastic may be found as the model is 3D printed, please clean them off when necessary..Other Usages: The assembled model makes a birthday gift for children, lovers and friends, or a decor for Halloween, Christmas and other festivals.Specifications:.Material: PLA.Product Weight: 100g.Package Dimensions: 30 x 20 x 10cm.Package Weight: 200g.Packing: Bag