The National Museum of the American Indian may not seem a likely place to see colorful, abstract work by a 20th-century modernist, but that’s just what lies in store for families there this fall. “Modern Spirit,” which originated at the Minnesota Museum of American Art, is a retrospective of work by the Minnesota-born artist George Morrison: paintings, prints, drawings and sculptures that reveal a fascination with landscape and horizon and resonate with a distinctive combination of calm intimacy and the energy of the Abstract Expressionists. Kids will especially love Morrison’s exuberant use of color and light. All ages.