Everyone is creative, and they can become more and more creative. However, most people don’t believe they can become more creative. This research aims to explore how to help people build a creative growth mindset, which means an individual believes their creativity can be improved. A creative growth mindset plays a crucial role in individual and collaborative creative performance. This research uses participatory methods, actively involving adults to play games, work collaboratively, and use tools to explore the process that facilitates creative growth mindset development and enhances collaborative creativity. The results of this study are expected to inform the process of creative mindset development. The results will also inform the design of a game toolkit to be used in the daily life environment.