Kobo-chan(1992)

Kobo Tabata lives in a typical Japanese family. His father is a normal salary-man, his mother's a typical housewife, his grandparents (from his mother's side) help to take care of the family and it's pets, and his uncle's a slightly obese high school teacher. Still, they manage to find odd situations that sometimes arise due to Kobo's growing up process or simply because of their own habits and misunderstandings.

(Source: Anime News Network)