Kit to make real working model of windmill to glow LEDs. Develop scientific creativity. Perfect Gift. School project. Two options of usage. Option 1): Generate electricity by manually rotating pulley which in turn rotates fan mounted on a tower, like wind mill We can't easily spin fan blowing wind everywhere every time. So kit has this option of fan rotation by using hand operated pulley Usage option 2): Remove rubber band from pulley. Blow against windmill fan blades. Blow rotates fan and glows LED It will help kids to learn basics of electricity generation using wind mill