This is the kit that reproduces a 1/10th-scale working model of an ancient Chinese navigation chariot that points in the same direction, regardless of the direction of travel. Invented in 225 A.D. by mechanical engineer Ma Jun during the Three Kingdoms period, the chariot's differential gearing system provided solitary cardinal direction centuries before the magnetic compass. Romantically known as the "South Pointing Chariot," it is considered by antiquarians as one of Ancient China's most complex inventions, yet it's dragon finial will point in any direction to which it is initially oriented. Made from poplar, the kit's 37 pieces snap out from three backing boards. Detailed written instructions guides builders through construction with clear pictures. Poplar's soft grain makes it easy to sand and trim. Assembly required using basic woodworking tools such as a utility knife, a flat and round file, sandpaper, wood glue, and clamps. Made in the U.S. Assembled 14" L x 7" W x 14" H. (2 lbs.)