Students can test rotor and blade designs by varying the rotor sweep, blade size and blade shape to change the electrical output of the generator. Test rotor output with the included multimeter or see how many LEDs are lit. Students can also fold a cardstock model house and create their own LED circuit to plug into the wind turbine generator. Completely assembled with PVC stand. Also includes printed house layout and instructions. A box fan or similar fan on a stand is required but not included.