The eldest. She is large in size. She is also the one who works the most. She buys things at the market, plays with the others, cooks, and so on. Likes: The Second, the Third, cake, chicken, pizza, cookies, steak, tteokbokki, giving money to the homeless, kimchi. Dislikes: Vegetables, the Second and Third pestering her. Age: 6. Can only say "Goo Goo Ga Ga." Source: Goo Goo Ga Ga Discipline Collection Channel.

The second child. She is about half the size of the First. She is also the laziest. She secretly buys chicken at the market while pretending to shop with the First, so she gets scolded a bit. Likes: The First, the Third, and the foods the First likes. Dislikes: Fighting. Age: 4. Can only say "Goo Goo Ga Ga." Source: Ground D.

The third child. A small (cup-sized) penguin who can only drink milk for now. Likes: Things the First and Second like. Dislikes: None. Age: 3. Can only say "Goo Goo Ga Ga." Source: Ground D.

The youngest. He is only about the size of an eraser. Likes: Things the First and Second like. Dislikes: Fighting. Age: 2. Can only say "Goo Goo Ga Ga." Source: Ground D.