The aim of this study was to determine the ability of children’s geometry 4-5 years at TK Pembina Negeri 1 Bangko Rokan Hilir Regency by game of shape sorting cube, to determine how the application of shape sorting cube game was improved the ability of children’s geometry 4-5 years at TK Pembina Negeri 1 Bangko Rokan Hilir Regency, as well as to determine whether the shape sorting cube game…