This paper examines how to design interactive multimedia learning environments to provide necessary support for developing higher level cognitive skills. We looked at one approach of engaging learners as multimedia designers using a project-based learning approach. We described this learner-as-multimedia-designer environment and synthesized the research, conducted over the past several years, of the effect of such a learning environment on cognitive skills development for high school, middle school, and elementary school students. Research findings at each level were discussed and insights on designing such a learning environment were shared. Cognitive skills in this case refer to the design skills and resource management skills as needed in producing a multimedia product.