A biography of Martin Luther King, Jr. for children can be found at the website for National Geographic Kids. A very brief, child-appropriate biography can be found at America's Story from America's Library, a website administered by the Library of Congress. A video biography can be found on Scholastic's website.
The National Geographic Kids biography includes an account of Martin Luther King, Jr.'s early life, family life, role in the civil rights movement and death. The biography is accompanied by a number of photos of King and his life. The America's Story biography is brief. It highlights his role in the civil rights movement and mentions his assassination. The Scholastic video is 1:41 minutes long. It features pictures and simple language about his early life, segregation, family life and role in the civil rights movement. His assassination is not mentioned.