A wind turbine is a device that will convert wind into mechanical movement which we can use the power water pump or electricity generator. Now the power that a turbine creates is obviously dependent on the wind speed. It’s also dependent obviously on the number of sails, the area of the sails and the angle that the sails makes to the wind. So if you can imagine if the turbine blades are flat onto the wind. The wind is just going to sort of bend it, but if they’re a slight angle when the wind hits it. It’s going to turn the blades and we can use that for powering things. Now we’re going to have a go at making some very very simple paper windmills. The sort of things that you can make from the bits and pieces lying around at home and use that to drive a very small generator to power electronic devices.