Take on the ultimate K'NEX building challenge with the Grandfather Clock building set! With over 9,000 K'NEX parts and standing 7 feet tall, the Grandfather Clock is the largest K'NEX set ever created. Follow the color-coded instructions for hours of building fun! The Grandfather Clock is also a real working clock, with moving hands, a swinging pendulum and even sound chimes. Requires a plug-in motor with AC adapter (included) and 3 AA batteries (sold separately) to function. Product ships in 2 separate boxes. Standard K'NEX parts made in the USA. Clock made in China. Packaged in the USA.• Over 9,000 K'NEX parts• Stands 7 feet tall• Working clock face, swinging pendulum and sound chimes• Includes plug-in motor with AC adapter• Requires 3 AA batteries (sold separately)