"The question is: does this really have educational value? "Turtles all the way down" is a great slogan, and a fine way to teach a graduate-level class on compiler technology, but I feel that the higher-level UI for tile-based program editing is the really useful thing for tablet computing. I'm a compiler geek and love the grungy underbelly of this stuff, but I keep reminding myself I should really be spending more time building a beautiful fluffy surface." You are doing the right question I remember here "No silver bullet" [1] Different languages, different levels of abstraction, need different interfaces, and text is powerfull interface. May be is not the best interface to start to program, but surely graphic block are not the best interface to do programs of more than 400 of blocks. Gonzalo [1] <a href="http://en.wikipedia.org/wiki/No_Silver_Bullet">http://en.wikipedia.org/wiki/No_Silver_Bullet</a> <div class="gmail_quote">On Fri, May 20, 2011 at 10:30 AM, C. Scott Ananian <<a href="mailto:cscott@laptop.org">cscott@laptop.org</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">I've done a little more work on "Turtles All The Way Down", which I (very briefly) discussed at EduJam. I actually wrote a garbage collector in TurtleScript for TurtleScript on Sunday. Brief writeup here: <a href="http://cananian.livejournal.com/64140.html" target="_blank">http://cananian.livejournal.com/64140.html</a> and exhaustive mind-numbing detail here: <a href="http://cscott.net/Projects/TurtleScript/" target="_blank">http://cscott.net/Projects/TurtleScript/</a> No actual turtles yet! I'm going to have to fix that soon. --scott -- ( <a href="http://cscott.net" target="_blank">http://cscott.net</a> ) _______________________________________________ IAEP -- It's An Education Project (not a laptop project!) <a href="mailto:IAEP@lists.sugarlabs.org">IAEP@lists.sugarlabs.org</a> <a href="http://lists.sugarlabs.org/listinfo/iaep" target="_blank">http://lists.sugarlabs.org/listinfo/iaep</a></blockquote></div>