A Community Paint Day to help with the River Life Mural Project drew 35 people to Andrews Middle School on March 23. Students and parents painted the mural, with tips provided by Cambridge artist David Fichter, who designed it. Fichter, an artist in residence at the school, worked with Andrews art teacher Peter Gallagher on the project. Private fund-raising and a grant from the Massachusetts Cultural Council paid for the project. Children were asked to think about historical, social, and ecological changes on the Mystic River. They drew more than 300 pictures, including Paul Revere’s famous ride and American Indians who settled along its shores. The final product will be a 12-panel mural that will be hung on an exterior school wall, located about 200 feet from the Mystic. It will be officially unveiled during River Day on May 17.Kathy McCabe can be reached at email@example.com. Follow her on Twitter @GlobeKMcCabe.