If you have played with Etoys, you might have seen The Etoys Castle (or The Demon Castle) tutorial. But you would never know how the story ends, because the Etoys distribution only includes the first chapter, and the last slide shows "To Be Continued ...". However, there are actually the hidden sequels, and the story has a happy ending.
When I first wrote the story in 2006, there were three chapters. The first chapter was about learning "handles", the second one was about the painter, and the third one was about scripting. But due to some technical issues, I gave up to publish them. Today, I happened to clean up my hard drive and I found old files. It's shame that I have never published rest of them. So I gathered the screen shots and made up one page html.