This study aimed to explore the process of co-creating free play experiences between parents and children in the context of the "PLAYBAG" project (a home-based free play intervention protocol) in Hong Kong. The study utilized the narrative inquiry approach and collected qualitative data from 24 parents who participated in the focus group interviews. This study has made significant contributions to social work practice in three ways. Firstly, it identified four core elements for parental education in kindergartens: relating rapport, capturing moments, co-creating new experiences, and re-authoring identity. These elements enhance parental education on home-based children's free play. Secondly, promoting free play in community education programs is crucial, emphasizing its benefits for mental health and parent-child relationships. Lastly, social workers can collaborate with designers to create suitable materials for home based free play. Overall, this study provides practical strategies to enhance social work practice and benefit children and families.