Smithsonian Institution
Smithsonian National Zoo: Zoogoer Magazine: Manatees
This article covers a variety of topics related to Manatees including Agile Underwater Behemoths, Danger in the Water, The Power of Moving Teeth, The Florida Manatee, and more.
National Geographic Kids
National Geographic Kids: Animals: Manatees
Come swim along with the manatees and learn more about them while you're at it! Site includes fun facts, a video as well as games and activities.