Drinking Bird
Tax included.
The ever-popular, fascinating drinking bird - Place the bird by a glass of water, pop its head into the water to soak, and as the instructions say: 'then the bird begin drinking water by himself', moving its head back and forth as it sips. It's a metronome - and should continue moving (sometimes slowly, but always surely) without any help at all, rather like perpetual motion. Though it is sensitive to colder temperatures. Which should give you a clue as to what's happening... Not for use by young children though, as it is breakable. 10+