I like the idea, definitely the sort of thing you want to get used by school-age students not 'proper' computer scientists though. Recently was reminded of just how damn easy it was to do the most basic of programming in the BBC Micro era; no real syntax, no complexity, but in 10 seconds you could write something that printed 'JOE ROCKS' infinitely on the page. If this has the same level of just-do-it, and sufficient sample starting points, it could be really cool.