During the shifting of teaching and learning methods using computer technologies, much emphasis was paid on the knowledge content more than the thinking skills. Thus, this study investigated the effects of a computer application, namely, designing electronic slides on the development of creative thinking skills of a sample of undergraduate students. A total number of 50 subjects, 25 in an experimental group and 25 in a control group were selected and a design of pre and post-test with an experimental and a control group was employed in this study. Torrance Test for creative thinking (TTCT) form (A) was applied on both groups. The experimental group was taught to design electronic instructional slides using Microsoft PowerPoint. After six weeks, both groups were given the TTCT form (A) again. Using Analysis of Covariance (ANCOVA), the findings revealed significant differences between the two groups favoring the experimental group over the control in the total creative thinking scores. Designing electronic slides can enhance the creative thinking skills for students, and the expansion of using computer applications in promoting thinking and learning skills is recommended.