noun
Playful, affectionate, or teasing term for a child, often used by adults when speaking to or about young children. Can sound slightly condescending if used for older kids.
お子ちゃまにはまだ早い映画だよ。
This movie is too early for little kids.
うちのお子ちゃまがお世話になりました。
Thank you for taking care of my little one.
noun
childish person; immature person
Used teasingly or critically for an adult who acts like a child. Often light-hearted but can be mildly insulting.
彼はすぐ拗ねるから、まだお子ちゃまだね。
He sulks right away, so he's still a child.
そんなことで怒るなんて、お子ちゃまかよ。
Getting mad over something like that—what are you, a kid?