playing with a ball; ball games
General term for informal play involving a ball, such as catch, kicking a ball around, or simple ball games. Often used in contexts like children's activities or park rules.
公園で子どもたちがボール遊びをしている。
Children are playing with a ball in the park.
ここではボール遊びは禁止されています。
Playing with balls is prohibited here.
Compound of ボール (ball, from English) and 遊び (play, the noun form of 遊ぶ).