Name: vapour engine experiment toy SKU: EK-D029 Material: ABS Age Range:7-14 years old Package size: 22.5cm*16,5cm*5cm Weight: 575g This product uses alcohol to heat water in restricted space. When the water is heated and steam-vaporized in water vapour, it is covered by t expands to generate air pressure to push the piston into motion, to generate mechanical energy, to give the wheel the initial speed of the charge, to push the piston to reciprocate, and drive the engine to generate electricity by runs through experiments, make children understand the basic principles and application of a clean engine.