Comment BASIC and/or Perl (Score 1) 799
Perl is a very good language to learn as a beginner. You don't have to go into all the cool uber geek tricks to make it do incredible amounts of work. The syntax is easy to learn for simple programs.
And I might be a bit biased here, but why not dish out a dose of BASIC on an emulator? While BASIC 2.0 on a C64 doesn't provide good graphics and audio controls, BASIC 7.0 on a C128 does. Very importantly is that this could give some pretty instant gratification to a kid who might be interested in writing a game. The VICE emulator provides C128 emulation that would be good for this.