noun
children's playground; children's park
A small park or playground designed for children, often with play equipment. More formal than 公園.
近所の児童遊園で子供たちが遊んでいる。
Children are playing at the neighborhood playground.
公園 is a general park, while 児童遊園 specifically refers to a children's playground or small park with play equipment.
Compound of 児童 (child) and 遊園 (amusement garden/park).