3D modelling is one of the most challenging and important techniques in multimedia lectures. This paper describes a novel edutainment-based teaching strategy that combines social activity (facebook) and project-based learning as gaming in presentation aimed at fostering students' engagement. The designed approach relies on the intensive use of 3D architecture tools and makes the courses amusing and engaging. In the social activity, students are required to promote the final product and try to demonstrate to people online. In teaching project goal, learners work together and learn to establish big project as team work. In the final stage, the proposed rich man-like gamming competition is taken into place. We had applied the novel teaching approach in real university course. The empirical result showed that learners not only immersive in doing project, but also substantially improves the 3D modeling capability in course. Furthermore, some learners clearly indicated that the teaching method help to be learning much more actively.