Damn, ninja'd
Very well, in that case: Aria [http://anidb.net/perl-bin/animedb.pl?show=anime&aid=2659].
Also, at the moment I am watching Glass Mask [http://anidb.net/perl-bin/animedb.pl?show=anime&aid=2994]. Not sure how it ends yet, but so far it's definitely recommended for a 12 year...