A die-cast model of Sodor's cheerful green engine, Learning Curve's Battery-Powered Percy brings life to a child's wooden railway. With an easy start button and glowing headlights, the four-wheel-drive engine powers itself around the track and can even pull other cars. It requires one AA battery (not included).
― “There's quite a bit [of growth] in the battery powered engine category with … the Learning Curve items,” said Keith Schumacker, manager of Talbot's Toyland in San Mateo, Calif., when asked about his best-selling battery-operated toys during a summer 2010 survey.