I haven't seen it mentioned in the Kindle Fire forum, so I thought I'd bring it up in case anyone is interested. One of the projects Google Labs came up with before it was shut down was an easy to use programing environment for Android called App Inventor. What makes App Inventor different is that you design your program's GUI in your web browser, while the coding is done in a Java applet using drag and drop blocks of code with minimal actual programming.
Fortunately Google donated the project to MIT when they closed down Google Labs and MIT has picked up where Google left off. I haven't used it since the switch to MIT, but I found it fairly powerful and easy to use for a visual programming language.
This is a YouTube video showing the basics of App Inventor and how it all fits together.
This is a link to MIT's site for installation instructions and downloads.
And here's a blog on using App Inventor to create apps for your Kindle Fire.