This medium temperature Stirling engine is powered by the heat of a usual tea light candle. It is highly suitable for easy and quick demonstration of the basic thermodynamics 'working' in a hot air engine and is great fun to assemble... The kit is packed within a box, that will be used as the engine's housing. It includes all necessary parts (~150) to assemble the engine and the candle rack. Neither gluing nor machining is required. Only common hand tools are used. Includes assembly drawings and a construction guide (which provides the step-by-step instructions to build) including a paragraph explaining the engine's function both in English and German language. Dimensions: diameter ~100 mm, height ~250 mm. Speed: about 300-600 rpm. The included candle gives an operation time of about 3-4 hours.