noun
child's room; nursery
A room in a house designated for children, often used for sleeping, playing, or studying. 子ども部屋 is common in family and educational contexts.
新しい家には子供部屋が二つあります。
The new house has two children's rooms.
子ども部屋をおもちゃでいっぱいにした。
We filled the child's room with toys.