Gyroscope.com - Hand Boilers

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	Hand Boiler - £4.99
	A very interesting simple fun toy. When the lower portion of the glass sculpture is held, the liquid rushes into the upper section, and appears to boil furiously. More information about the Hand Boiler

	Drinking Bird - a novel heat engine - £5.99
	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