+1 for the Pokemon and Digimon recommendations

For Pokemon, the specific series I can recommend is Pokemon: Horizons. Different protagonist from the original - Ash - but I think I enjoy the story more.

For Digimon, the one I have the strongest impression of (from the time I watched them as a kid) is Digimon Frontier.

One more anime that hasn’t been mention yet is Cells at Work!. I know for a fact that there are kids who watch this anime.