PBS
Pbs: Journey to Planet Earth: Rivers of Destiny
Journey to four major river systems - the Mississippi, Amazon, Jordan and Mekong rivers - and take a look at the challenges happening to the people whose livelihood hinges around them.
Ducksters
Ducksters: Geography for Kids: World Rivers
Study the world rivers like the Nile, Amazon, Yangtze, Mississippi, Lena, Yellow, and Congo Rivers on this website.