Based on a sociocultural perspective, this study investigated the learning experiences of a selected group of older adults learning computing technologies at a social center in Hong Kong. Data generated from in-depth interviews were used to develop a model of evolving motivation that explains how this group of "anxious novices" had gradually developed into "motivated experts" capable of showcasing their computing achievement to the public. The model highlights the significance of social supports derived from various social contexts in helping older adults make sense of their learning and develop lasting interest in computing technologies.