Academy Da Vinci Self Propelling Cart Description From the Manufacturer Academy's Da Vinci Self Propelling Cart is an interpretation of the original drawing, designed during the Renaissance era by the famous Italian scientist and artist, Leonardo da Vinci. This spring powered kit is a joy to build, and snaps together without any tools, glue, batteries and doesn't need painting. Imagine holding a piece of history in your hand and it operates as well. This Self Propelling Cart was the first robot-cart in history and it was used to carry actors from one side of a stage to the other. Another wonderful educational model in Academy's Da Vinci Machine Series, this spring powered model is sure to please the historical student or the budding modeler looking for a unique, yet easy to build model kit. Academy's technical engineers captured the wonders of this mechanical masterpiece, designed by the most celebrated historical figure in science and technology, making this model a joy to build, display or operate. Features: Snap together kit; no glue, tools or painting required Historically accurate, designed by Leonardo da Vinci Spring Powered, wind-up mechanism Easy assembly Smooth, desktop operation Product Details: Brand: ACADEMY Age Range (Description): Kid Color: 成型色 Theme: historical Cartoon Character: Leonardo Brand: ACADEMY Age Range (Description): Kid Color: 成型色 Theme: historical Cartoon Character: Leonardo Item Dimensions LxWxH: 3.94 x 3.54 x 1.97 inches Material: Plastic Item Weight: 0.57 Pounds Number of Pieces: 1 Style: Unique Product Dimensions: 3.94 x 3.54 x 1.97 inches Item Weight: 9.1 ounces Item model number: 18129 Manufacturer recommended age: 14 years and up Is Discontinued By Manufacturer: No Manufacturer: Model Rectifier Corp. Date First Available: May 7, 2010