Sesame Street
The Sesame Workshop: The Sesame Street Story Corner
An excellent interactive site for children, including stories by Elmo, Big Bird and others. Dozens of stories and storybooks for children to read while learning essential skills.
Smithsonian Institution
Smithsonian Education: From Old World to New World
Plants have migrated around the world just like people. This site explains how several African plants and food crops made their way into American life.