Power Library- Use SIRS Discoverer (in Children's Resources)
to search for articles about Mesopotamia. This is an excellent resource!
http://www.kidskonnect.com/subject-index/16-history/257-ancient-mesopotamia.html
http://mesopotamia.mrdonn.org/
http://www.mesopotamia.co.uk/
http://www.mrdowling.com/603mesopotamia.html
http://www.socialstudiesforkids.com/articles/worldhistory/sumerianfirsts1.htm
http://en.wikipedia.org/wiki/Ziggurat
http://www.nlcs.k12.in.us/oljrhi/brown/mesopotamia/meso.htm
http://www.waterencyclopedia.com/Hy-La/Irrigation-Systems-Ancient.html