My wife was teaching stem and leaf plots to first year business students recently and wanted to dynamically show how they are built from a raw data set. We use Powerpoint 97 which doesn't support motion paths, so makes any kind of "real" animation difficult. Open Office's Impress has a half-hearted approach to motion paths, but they are pre-defined (although please correct me if I'm wrong!). As a result I ended up using the only animation software I have, which is the Flash-based Swish. For a quick effort, the animation works reasonably well.