noun
romper room; children's play room
A room or facility designed for young children to play in, often with soft equipment and supervision. The term is a direct loan from English and is used in contexts like daycare centers, family restaurants, or shopping malls.
このレストランにはロンパールームがあるので、子連れでも安心です。
This restaurant has a romper room, so it's safe even with small children.
ショッピングモールのロンパールームで子供
I let my child play in the romper room at the shopping mall.