Personally as a kid I think the series is in enjoyable for all ages,( as my parents have also watched it and enjoyed!) Though I do think that season one is a little slow paced compared to the other seasons I still enjoyed watching it, as to an extent it sets up season 2&3,(which we’re both amazing in my opinion.) I think it has loads of theories branching off it to do with bending abilities, history of the series and more. So if you enjoy watching all the theories videos and speculating on your own I recommend this to you. It also has good concepts and Morros ( I think I’ve spelled that wrong!)
Anyway I do recommend watching this it’s on Amazon prime and Netflix!