The document summarizes the process of developing the "Family by Family" program through 12 months of co-design and prototyping with families in Adelaide, South Australia. The team started by observing families to understand their lives, developed early ideas like a "Family Exchange" which failed, and created the roles of seeking families, sharing families, and coaches. They iteratively prototyped and tested various aspects of the program like recruitment materials, training, matching families, and measurement tools over 13 versions, in order to learn how to best create change for families.