<?php
$child_pages = $wpdb->get_results("SELECT * FROM $wpdb->posts WHERE post_parent = ".$post->ID."    AND post_type = 'page' ORDER BY menu_order", 'OBJECT');    ?>
<?php if ( $child_pages ) : foreach ( $child_pages as $pageChild ) : setup_postdata( $pageChild ); ?>

<?php
// Must be inside a loop.
if ( has_post_thumbnail($pageChild->ID) ) {
get_the_post_thumbnail('page-thumb-mine');
}
//  else {
//  echo '<img src="' . get_bloginfo( 'stylesheet_directory' ) . '/images/icon-cropped.png" />';
//  }
?>

<div <?php post_class(); ?>>
<?php echo get_the_post_thumbnail($pageChild->ID, 'page-thumb-mine'); ?>
<h3><a href="<?php echo get_permalink($pageChild->ID); ?>" rel="bookmark" title="<?php     echo $pageChild->post_title; ?>"><?php echo $pageChild->post_title; ?></a></h3>
<?php echo excerpt(28); ?>
</div>
</div>
<?php endforeach; endif;
?>