With some extra electrical and other non-papercraft components (like a bamboo skewer, rubber bands, and most importantly a small "genemotor" (generator motor) like the XGM-RA from XiKIT) you can make this papercraft wind turbine really generate enough electricity to power an LED*!
Download + build your own working* papercraft wind turbine generator (by KCCT Kobe City College of Technology Dep. of Mechanical Engineering Waseda Lab):
(*Note: you'll need some electrical and other non-papercraft components to make it really generate electricity of course! ;o)