Fetching details from the dictionary...
organization for local children (for growth via sports, study, service, etc.)
息子が子供会に入会した。
My son joined the children's organization.
子供会で夏休みのイベントが開かれた。
A summer holiday event was held by the children's organization.
子供会の活動を通して地域社会に貢献できた。
Through the children's organization's activities, we were able to contribute to the local community.