[Wordpress] List sub-pages, but skip 1st level

Question

How can I list subpages but skip the first level of pages?
Here is my current query, but I want it to drill down 1 level deeper and only list sub-sub-pages.

<?php
$args = array('post_type' => 'page','numberposts' => 10,'post_parent' => $post->ID);
$subpages = get_posts($args);
foreach($subpages as $post) :
setup_postdata($post);
?>
<div>  
<?php the_title(); ?>
<?php the_excerpt(); ?>    
</div>
<?php endforeach; ?>

Any ideas?

Answer 1

array_shift($subpages);

Will knock the first item out of the array.