Mower is a cartoony Styrofoam robot sheep that can roam large public lawns with shears in its mouth and rangefinders in its eyes, clipping the grass and avoiding obstacles. But this is no John Deere Graze-o-matic: it's art. Its creator, Osman Khan, references a classic Philip K. Dick sci-fi story (the basis for the movie Blade Runner) to make an object that juxtaposes animal and machine. Do androids dream of electric sheep? Maybe, if they're as fun to watch as "Moe."