What kind of child do you want?
https://www.mangago.zone/read-manga/yuzuki_san_chi_no_yon_kyoudai/
I can say that the third kid has a child mentality speaking from experience lmao he's like me frfr
Superstar from age 0
Children of the rune winterer
Centuria
The shaman
Zomgan
Shadows house
Informer
Surviving the Apocalypse
Some are a little older but i still consider them children
Here you go enjoy my dear
https://www.mangago.zone/home/mangalist/1408361/
Any recs where the child has an ACTUAL child's mentality and isn't some cunning adult in a kid's body? any genre is fine.
What I've read:
Piano no Mori,
Gakuen Alice,
Suijin no Hanayome,
My mom entered a contract marriage,
Gakuen Babysitters,
Spy x Family,
I become a fool for my daughter