Geometric shape recognition ability is among preschool children's cognitive development indicators. It is necessary to design an innovative method to stimulate their cognitive development through play, such as geometry fun circuit play. However, this play needs further security on its effects on children's geometric shape recognition ability. The present study attempted to test the effect of geometry fun play on preschool children's geometric shape recognition. A quasi-experimental study with a non-equivalent control group design was applied involving thirty participants. The experimental and control groups in this study showed a significance value of <0.001, meaning that the geometry fun circuit play significantly affects preschool children's geometric shapes recognition. Geometry fun circuit play is recommended as one of the alternatives parents, and teachers can use for stimulating preschool children's cognitive development.