Hot Air Stirling Engine Motor Model DIY Unassembled Steam Flying Saucer Full Metal Physics Science multicolour44.00Buy!£Joom UKDelivery: to United Kingdom ReportFeatures: DIY unassembled Stirling model kit, enhance hands-on ability, experience the fun of assembly. The size after assembly is 12x9x13cm4.7x3.5x5.1in. Made of high quality metal, enabling the mode more→l sturdy and durable. Metallic texture and unique flying saucer appearance make it an eye-catching desktop decor. Fuel is anhydrous ethanol or 95% medical alcohol. Ignite after filling the fuel, wait for the water to boil, then gently push the flying saucer, it will start to rotate. Water needs to be added to the flying saucer to produce steam to make the it rotate, very easy to operate. Mute design, give you a comfortable environment and don t disturb others. A fantastic gift for kids science …