Cosmos 4 kids
Cosmos4 Kids: Reaching Middle Age
This site explains the stages a star goes through from a main sequence to death. This site includes a video.
CK-12 Foundation
Ck 12: Earth Science: Life Cycles of Stars
[Free Registration/Login may be required to access all resource tools.] Examines the formation of a star and the main sequence of the star's life cycle.
NASA
Nasa: Astronomy Picture of the Day: Giant Stars
Image of a group of red giant stars are seen in an image from the edge of the plane of the Milky Way. The evolution of these stars is explained. Many embedded links contained in the text to related topics.