Minecraft seems like the most natural input point to kids learning to program.

You're right, this is very cool:

The tutorial, which is already up and running, is broken down into 14 increasingly complicated “puzzles.” You drag and drop blocks representing commands into your workspace, and press “Run” to see your Minecraft character navigate its world—chopping down trees and shearing sheep. After you complete a puzzle, you can view the code you wrote by seeing the blocks translated into Javascript.