Wordpress list page children content

wordpress-list-page-children.php

<?php
$args = array(
	'post_type' => 'page',
	'numberposts' => 99,
	'post_status' => 'publish',
	'order'            => 'ASC',
'post_parent' => 1, // Any post parent
);
$attachments = get_posts($args);
if ($attachments) {
	foreach ($attachments as $post) { ?>
	<div class="child-page-item clearfix" id="post-<?php the_ID(); ?>">
		<?php if (  (function_exists('has_post_thumbnail')) && (has_post_thumbnail())) : ?>
		<a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_post_thumbnail(''); ?></a>
	<?php else :?><?php endif;?>
	<h3><a href="<?php the_permalink(); ?>" rel="bookmark"><?php the_title(); ?></a></h3>
</div>
<?php								
}
}
?>