The author thanks Christian Goetze for the inspiration for this paper, as well as for demonstrating and installing most of the mentioned tools. This article should be seen as a contribution to the project, ``Designing a networked computer-based educational hyper-environment,'' which is funded by the Fukushima Prefectural Foundation for the Advancement of Science and Education [Hua97]. The motivation and discussion provided by project members Runhe Huang, Jianhua Ma, and William L. Martens is greatly appreciated. Last but not least, without the computer network, which is designed and maintained by the ISTC, nothing would work. Thank you.