Here is a list of websites that may be of use to both you and your students. They provide a range of interesting facts, ideas, pictures, activities and games to engage students in environmental and water education.
http://www.ourwater.vic.gov.au/
Information about the Victorian government's program of water saving initiatives.
http://www.vicwater.org.au/index.php?sectionid=636
VicWater's education pages
http://education.melbournewater.com.au/
Melbourne Water's Education pages
www.savewater.com.au?waterid=7
Savewater - Australia's leading resource on water conservation
http://www.savewater.com.au/mission-h2o-game?waterid=7
Mission H20 Interactive Game