Avatar the last Airbender:
Literally the best cartoon out there in my times as a child, its goofy but also has serious moments and just generally gives good morals to children so if you got children i would really recommend you to let them watch this show it talks about things like, sexism, how to forgive those who wronged you and mainly just how to be in mental harmony with yourself.
Now that were done with the boring stuff, its literally the most action you will ever find in a children cartoon, rocks being thrown around, thunderbolts spewing out of fingers, bloodbending, flying and even more i would literally do free advertisement for that show if i could its that good