Technologies for E-Learning and Digital Entertainment Second International Conference, Edutainment 2007, Hong Kong, China, June 11-13, 2007. Proceedings - Hui, Kin-chuen; Pan, Zhigeng; Chung, Ronald Chi-kit; Wang, Charlie C. L.; Jin, Xiaogang; Göbel, Stefan; Li, Eric C.-L (Springer Berlin Heidelberg, 2007)