This is one of the most amazing and wholesome shows I have ever watched. It has its fair share of sad episodes, tense episodes and easygoing filler episodes. People from 8-13 would definitely enjoy it. Characters also have lots of development (!!spoiler!! Personally I believe Hiro Hao developed a lot after he escaped from being possessed by manipulens). I would really recommend it for fans of superhero shows like Miraculous Ladybug or My hero academia. Some episodes may be a bit too much for younger children though, including fight scenes and some really sad scenes (!!spoiler!! For example when Tee Zeng couldn't deliver the present she had made for her dad, or when Hiro hao was thought to have died after regaining his body) Overall I definitely recommend it, I believe any age could enjoy it!