The government has descriptive sites on energy production. One of them is on producing electricity from water, that is, hydroelectric power. The process is illustrated in an easy to follow format.
Water can be used to produce power:
Look at a hydroelectric power system- http://ga.water.usgs.gov/edu/hyhowworks.html
See a turbine- http://ga.water.usgs.gov/edu/hyturbine.html
Wind can also be used to generate power:
Great basic information on Windmills and...Many more links inside this one: http://www.michigan.gov/hal/0,1607,7-160-15481_19268_20778-52098--,00.html
American Windmills- http://www.windmills.net/
Fuel-less Power- http://www.fuellesspower.com/windmills2.htm
Discussion of Windmill Efficiency- http://www.nov55.com/wdm.html
Photos of Historical Windmills:
Photo of operational windmill in Australia- http://members.ozemail.com.au/~thelily
Photo of a windmill in Gardiner, NY (by Mike Rega)- http://www.istockphoto.com/file_closeup/?id=2957565&refnum=548652
Photo of the Hook Windmill- http://www.answers.com/topic/east-hampton-town-new-york?cat=travel
A gallery of 50 photographs of windmills-
The Beebe Windmill- http://memory.loc.gov/ammem/collections/habs_haer/
The Dump that becomes a park (with windmills)- http://nymag.com/daily/intel/2007/01/youll_be_able_to_frolick_in_a.html
Windmills at NYU- http://www.nyu.edu/nyutoday/archives/20/04/PageOneStories/Wind-Power.html
Tiny windmill powers workshop- http://picasaweb.google.com/slothmuffin/PhotoADay/photo#5082014917530784274
Paintings of Windmills-
Walter C. HARTSON, (American, 1866): Dutch landscape with windmills and a figure in a boat- http://www.burchardgalleries.com/auctions/2002/jan2002/l027a.jpg
Herman A. Webster (American, 1878-1970)- http://www.timsmills.info/Journal/BULLET61.HTM
Map of Windmills in Manhattan-
More information on the map- http://www.sunysb.edu/libmap/Manatus.htm
Windmills on the farm-
Grants for farm windmills- http://www.elpc.org/energy/farm/index.php?gclid=CKzbkaSewZACFTyKOAodDCYSZg
Perhaps you have developed an interest in other uses of windmills-
Commercial sources that may provide information on windmills (Listing does not constitute endorsement; Other commercial providers may submit links via comments)-
You can generate power by turning a crank:
It would be good to work with pin wheels, water wheels or crank generators in lab activities or experiments to help understand the points made. Similarly field trips to old mills, singing, "Old Mill Stream," or visiting a farm where a wind mill is used, or touring the windmills of New York State (part of the Dutch settlers' cultural heritage and positive influence on the state), or in several other other states (Illinois, Indiana,Ohio, Wisconsin, Michigan, Iowa ...), would also enhance learning about sustainable energy and power generation. (If you know a good website on windmills in your state, please add it to the comments.)
Some foundations work to reduce global warming. Here are some (Listing does not constitute endorsement; Other foundations and organizations may submit links via comments)-
Adopt a windmill- http://www.communityenergy.biz/adopt/adopt_windmill.html
Baker, T. Lindsay. A Field Guide to American Windmills. Norman, OK: University of Oklahoma Press, 1985. (Large volume—the ultimate windmill resource.)
Dennis, Landt. Catch the Wind: A Book of Windmills and Windpower. NY: Four Winds Press, 1976.
Ellis, Edward Robb, The Epic of New York City: A Narrative History. Carroll and Graf, Publishers, 2004.
Torrey, Volta. Wind Catchers: American Windmills of Yesterday and Tomorrow. Brattleboro, VT: The Stephen Greene Press, 1976.
Woelfle, Gretchen. The Wind at Work: An Activity Guide to Windmills. Chicago: Chicago Review Press, 1997.A Link of Interest found while searching windmills...
Farm Math for Young Children: http://www.michigan.gov/hal/Publish Post0,1607,7-160-15481_19268_20778-52087--,00.html