This seems like a far more hands-on and inspiring approach to teaching computer science to elementary, middle, or high school students than the typical intro to CS classes you see now, which might occasionally have some graphical interfaces, but primarily (at least in my limited experience) operate on the command line and do a variety of abstract things. It's a lot harder to fall in love with a sorting algorithm than with a turtle drawing robot or the interesting geometric patterns shown on pages 14-16.