Okay, here's my go at it. Uses POE so there can be many people "living" at once and creating new children. Reality has been sped up a bit so that each year of a person's life only takes 1/10 of a second. Actually runs too, though you may not want to leave it going for too long as the "population" increases rapidly. :-)

While this one may be more functional, the OP is a lot more fun to read, partially because I wanted to use strict and warnings which leaves less room for stuff that reads well, but doesn't actually do anything.

This also has a big friggin comet feature, just press Ctrl+C after it's been running for a while :-)

Enjoy!

#!/usr/bin/perl

use strict;
use warnings;

use POE;

*MATE = *STDOUT;

POE::Session->create(
    inline_states   => {
        _start        => \&_start,
        make_baby    => \&make_baby,
    },
);

$poe_kernel->run;

sub _start {
    my $kernel = $_[ KERNEL ];

    $kernel->alias_set('God');

    $kernel->post('God', 'make_baby');
}

sub make_baby {
    my $session = $_[ SESSION ];

    POE::Session->create(
        inline_states   => {
            _start  => \&born,
            _stop   => \&die,
            live    => \&live
        },
        args        => [ $session ],
    );
}

sub born {
    my ($heap, $person, $kernel, $init) = @_[ HEAP, SESSION, KERNEL, A
+RG0 ];

    $heap->{age} = 0;
    $heap->{gender} = (int(rand(2)) ? 'male' : 'female');
    $heap->{person} = $person->ID - 2;
    $heap->{kids} = int(rand(5));

    @{$heap->{actions}} = qw/Crying Sleeping Eating Pooping/;

    print "Child $heap->{person} born, age $heap->{age}, gender $heap-
+>{gender}.  Likely to have $heap->{kids} kids.  Actions: " . join(', 
+', @{$heap->{actions}}) . "\n";

    $kernel->delay('live', .1, $init);
}

sub live {
    my ($heap, $kernel, $init) = @_[ HEAP, KERNEL, ARG0 ];

    $heap->{age}++;

    if ($heap->{'age'} == 2) {
        @{$heap->{actions}} = qw/Screaming Crying/;
    } elsif (($heap->{'age'} >= 3) && ($heap->{'age'} <= 12)) {
        @{$heap->{actions}} = qw/Running Playing "Getting into Trouble
+"/;
    } elsif (($heap->{'age'} >= 13) && ($heap->{'age'} <= 15)) {
        if ($heap->{'gender'} eq "male") {
            @{$heap->{actions}} = qw/Eat Eat Eat Eat Eat Sleep/;
        } else {
            @{$heap->{actions}} = qw/Talk Talk Talk Shop Shop Sleep/;
        }
    } elsif ( ($heap->{'age'} >= 16) && ($heap->{'age'} <= 20) ) {
        @{$heap->{actions}} = qw/Flirt Flirt Flirt Flirt Flirt/;
    } elsif ($heap->{'age'} >= 21 && $heap->{'age'} <= ($heap->{'gende
+r'} eq 'male' ? 74.1 : 79.5)) {
        select MATE;

        @{$heap->{actions}} = 'Making and raising kids';

        if(int(rand(5)) == 1 && $heap->{kids}) {
            print $init->ID . "\n";
            $kernel->post('God', 'make_baby') or die $!;
            $heap->{kids}--;
        }
    }

    print "Person $heap->{person} turned $heap->{age}.  Their activiti
+es are now: " . join(', ', @{$heap->{actions}}) . "\n";

    $kernel->delay('live', .1, $init);

    if ($heap->{'age'} >= ($heap->{'gender'} eq 'male' ? 74.1 : 79.5))
+ {
        print my $will = "I, Person $heap->{person}, do make and decla
+re my last will and testament as follows: ...\n";
        $kernel->delay('live');
    }
}


sub die {
    my $heap = $_[ HEAP ];

    print "Person $heap->{person} died.\n";
}
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Update: Slightly restructed with "God" session because the children were keeping the parents alive after they were supposed to be dead :-)