Windmill, Wind power generator. To demonstrate generation of electricity by wind powered turbine. Wind produced by hand cranked fan which in turn turns a second fan connected to a generator. When the fan rotates it produces electricity and lights up a small bulb and also a voltmeter is connected which indicates the amount of current being produced. Comes complete with instructions. Dimensions 12″(300mm) x 805″(215mm) x 7.5″(190mm).