Home school experience (Score 1)

I've been teaching my ten year old son UNIX and programming via ksh shell scripting. Seems to be working - he enjoys it, he's learning his way around the command line, and he's learning some basics of programming.

GUI is something to introduce much earlier - he's been using it prior to his first birthday. If these kids are already working with computers they've already seen the Mac and/or Windoze GUI. Show them the power of the shell, and if they already have a clue, they'll realize what it can do for them.