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Drinking Bird - a novel heat engine - £5.99

OUT OF STOCK - click here to be emailed when its back in stock
This is a classic toy. The Drinking bird swings taking regular sips of water until it runs out of water. The toy often runs for days at a time despite just using evaporation of water to power the device. A great demonstration of thermodynamics. More information about the Drinking Bird - a novel heat engine