The Wallach-Kogan Creativity Tests were translated into Chinese and later fully computerized for research in Hong Kong. The normative data of two cohorts (1994 and 2002) of school children were employed to test the hypothesis that growth in creative thinking occurs in a society or culture during a period of education and curriculum reforms that emphasize creative thinking. Results of multivariate analysis of variance and subsequent univariate analysis of variance supported the hypothesis. Moreover, some interesting gender differences in creativity growth were observed, underlining the fact that boys and girls should be treated differentially to obtain a desirable creativity growth for them.