This is a show we stumbled upon and later found out about its huge and avid following. It's a Nickelodeon show, and I didn't have very high hopes. It is great. It is funny, clean, action-packed, engaging, and even presents moral lessons without being preachy or heavy handed. A perfect kids' show that is extremely enjoyable for adults who like fantasy/sci-fi animated shows. We are anxiously awaiting the next disc on Netflix now. I've been consistently impressed with the writing and animation, and there is a live-action feature film in production now. See it!