Nickelodeon has ordered a 20-episode second season of the new preschool series “Dora and Friends: Into the City!”

With a new curriculum emphasizing community service and emotional skills, the series has reached 13 million total viewers since its Aug. 18 debut and already has spawned the “Dora and Friends” app.

"Dora and her new friends have been met with huge enthusiasm from preschoolers who are embracing their camaraderie and community spirit, and we look forward to bringing kids along on even more adventures in season two," says Teri Weiss, executive vice president, Nickelodeon Preschool.