The purpose of this study was to investigate kindergartners' geometric (shape, area and symmetry) and spatial (spatial orientation and spatial visualization) thinking skills, in the context of gender and age. Whether kindergartners' geometric and spatial thinking skills vary by their age or gender was questioned. A total of 73 kindergartners (40 boys and 33 girls) aged between 4-5 ([image omitted] = 4,6) participated this study. Survey Design was used for this study. Participants were selected according to Convenience Sampling method. Accessibility of educational institutions and willingness of teachers, were decisive. "Geometric and Spatial Thinking Skills Test" (GEOST-ST) was used to collect the data. MANOVA (Multivariate ANOVA) was performed for data analysis. According to the results of this study, difference between children's mean scores of relevant geometric and spatial thinking skills, aren't statistically significant for gender and age.