Feature Homo ludens opticus The Magic Optical Kit Pal Greguss and Emo Rubik Giving students optical elements to play around with encourages them to try to explore the world of optics on their own. Log in or become a member to view the full text of this article. This article may be available for purchase via the search at Optica Publishing Group. Optica Members get the full text of Optics & Photonics News, plus a variety of other member benefits. Publish Date: 01 May 1988 Add a Comment Please enable JavaScript to view the comments powered by Disqus.