Complex sentence: As a magazine by children, Stone Soup, is part of a longstanding tradition of publishing writing that includes the St. Nicholas League section of Mary Mapes Dodge St. Nicholas Magazine, and in books such as "The Young Visiters" by Daisy Ashford.
Split into simpler sentences: As a magazine by children, Stone Soup, is part of a longstanding tradition of publishing writing by children. The magazine continues that tradition as found in the St. Nicholas League section of Mary Mapes Dodge St. Nicholas Magazine, and in books such as "The Young Visiters" by Daisy Ashford.