Sam Pollit is a fictional character from the novel "The Family from One End Street" by Eve Garnett. He is portrayed as a young boy who is part of a working-class family living in London. Sam is known for his adventurous spirit and curiosity, often getting into various mischiefs with his siblings. In the story, Sam's experiences reflect the challenges and joys of growing up in a large family. His interactions with his parents and siblings highlight themes of family dynamics and the importance of support and love in overcoming life's difficulties.