Family math night can easily be implemented into mathematics methodology courses providing an opportunity for field-based learning. Preservice teachers were asked to develop and implement an inquiry-based activity at a family math night event held at a local school with personnel, elementary children and their parents in attendance. This action research examines what preservice teachers discovered about how children learn mathematics during their interactions with parents and children. Preservice teachers' individual reflections focusing on children's learning were qualitatively analyzed and clustered. In addition, data from teacher educator's observation notes was used to triangulate findings. Four themes were identified in relation to children's needs for promoting learning in mathematics: (1) activity adjustment (2) engagement through guiding and questioning (3) motivational issues and (4) the use of manipulatives and visuals. The event appeared to offer preservice teachers insight into the elements of activities needed to guide children's learning in mathematics.