Question

How to make a battery operated working model of a windmill? What are the materials required and how to get it started?

Answer 1

The materials required are Cardboard,a motor , a battery, a fan, a switch and wire. 
Its very easy to make it. Cut out the cardboard sheet into three equal triangular pieces. Fix motor with the fan in one of the triangular sheet and place all the triangular sheets vertically. Put the switch at the back of windmill. And u are done