Last week, when I picked up the dirt-cheap Kindle Fire for $129 via Amazon.com's Cyber Monday sale. I figured, for that price, the tiny tablet would be a good iPad backup, and certainly more apt to withstand any drops by the clumsy fingers of a kindergartener. Plus, I was intrigued to see what this Android operating system was all about. A week later I can report that the Kindle Fire, which costs one-third of an iPad Mini and one-quarter of a full-sized iPad, is no iPad.