Nice, but if you want your class methods to use the class variables, you have to use the getters and setters as well.
I now use your code adjusted like this (also taken the point of misterb101.

package person;
use strict;
use Carp qw(croak cluk);

{
    my @attributes = (qw/NAME AGE/);

    sub new {
        my $type = shift;
        my $class = ref $type || $type;
            DEBUG    =>    1, # Values 0, 1, 2 (0ff, self, include chi
+lds)
            @_
        };

        my %DataStorage = map { $_ => undef } @attributes;
        
        my $self = sub {
            my ($name, $arg) = @_;
            
            #internal setter is able to create variables and getter-se
+tter
            my @caller = caller;
            if (!exists $DataStorage{$name}  && $caller[0] eq $DataSto
+rage{CLASSNAME}) {
                $DataStorage{$name} = $arg;
            }    
            croak "Method '$name' unknown for class $DataStorage{CLASS
+NAME}" unless exists $DataStorage{$name};
            $arg and $DataStorage{$name} = $arg;
            $DataStorage{$name};
        };
     
        #### convenience methods are denined here...
        for my $method ( keys %DataStorage ) {
            no strict 'refs';
            *$method = sub {
                my $self = shift;
                $self->( $method, @_ ); 
            };
        }
        bless $self, $class;
        
        $DataStorage{DEBUG} = $arg->{DEBUG};

        return $self;
    }
}

sub salute
{
   my $self = shift;
   print "Hello, I'm ",
         $self->NAME,
         " and I'm ", 
         $self->AGE, "!\n";

   # and i'm allowed to set my own object-variable "toes"
   $self->("TOES",5);
   print "I've got " . $self->("TOES") . " toes on each foot.";
}      

1;
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