The emoji 👩👧👦 convey the concept of family with mother, daughter and a son. These all shown as a single emoji on supported platforms.
Note: In 2016 Family: Woman, Girl, Boy emoji was accepted to Emoji 4.0.
👩👧👦 Family with Mother Son and Daughter
:woman-girl-boy: (Slack)Copy and paste emojiemoji copy and pasteemoji meaningfamily woman girl boy