The wall of the title belongs to a city building, its expanse broken only by a straggling vine, some graffiti, and a torn poster for some long-ago event. A boy addresses it. In textural, mural-like paintings folk-art-style children play on matte pages. Though the landscape is bleak, the neighborhood’s families—of all colors—eat, dance, and laugh together. The boy realizes that if something is to be done about the wall’s uncared-for expanse, it’s up to him. The boy organizes his neighbors, and with paint, ladders, and smiles, they create a beautiful mural. This story of urban renewal sends a welcome double message: neighbors and neighborhoods are more than the way they look, and ordinary people can band together to transform big things.