Henry's freedom box: A fictionalized story about a young slave who mails himself to freedom. Rosa: Recounts how Rosa Parks set the events of the civil rights movement in motion by refusing to give up her seat on an Alabama city bus. Martin's big words: Introduces the ideas and accomplishments of Martin Luther King Jr. using some of his own words. March on!: Martin Luther King Jr.'s sister recalls the day she heard him deliver his "I have a dream" speech.