From PGE (our local electric company)
http://www.e-smartonline.net/portland/66400_get_smart/energy-smart/index.html
This website has a lot of links off of it that are worth checking out:
http://www.alliantenergykids.com/energyandtheenvironment/renewableenergy/
A US .GOV site with some great information:
https://www.eia.gov/kids/energy.cfm?page=renewable_home-basics
Not written for children, but Nat. Geo. has a great article on Coal- it will challenge your thinking:
http://ngm.nationalgeographic.com/2014/04/coal/nijhuis-text
Check out these BSD links for great information. Be sure to click on the other tabs at the top for related information, pictures, graphics, and other sources of information!
Wind Energy:
http://www.worldbookonline.com/student/article?id=ar605910&st=wind+energy#tab=homepage
Solar Power:
http://www.worldbookonline.com/student/article?id=ar518880&st=solar+power#tab=homepage
Nuclear Energy:
http://www.worldbookonline.com/student/article?id=ar396440&st=nuclear#tab=homepage
Coal:
http://www.worldbookonline.com/student/article?id=ar120420&st=clean+coal#tab=homepage
Hydro Power:
http://www.worldbookonline.com/student/article?id=ar594360&st=energy+from+water#tab=homepage