Up to six
Spidey and His Amazing Friends, Transformers: Rescue Bots and Iron Man and His Awesome Friends are gentle introductions.
Seven to ten
Justice League Action, Dinotrux, LEGO Ninjago: Dragons Rising and Captain Planet and the Planeteers are lively and colourful.
Eleven and up
Transformers: Prime, Kipo and the Age of Wonderbeasts, Superman: The Animated Series and The Spectacular Spider-Man have bigger stories.