The great grand-daddy of all clocks has been unveiled to the public - a water-powered cuckoo clock as big as a HOUSE. The giant 25ft-tall clock houses a three-foot wooden cuckoo that chimes every hour, and took 72-year-old Richard Pim more than three years to build. But building the water-powered 'folly' didn't come cheap - Richard reckons he's splashed out in excess of #20,000 on the wooden structure.