<?php
      $args = array(
	'post_parent' => $post->ID,
	'post_type' => 'page',
	'post_status' => 'publish',
	'posts_per_page' => 5
);
	 $postslist = get_posts($args);
     foreach ($postslist as $post) :
        setup_postdata($post);
     ?>
         <div class="portfolio_box">
             <div>
             <h2 ><a href="<?php the_permalink(); ?>"><?php the_post_thumbnail('thumbnail');; ?>  <?php the_title(); ?></a></h2>
             </div>
             <div class="indexexcerpt">
             <?php the_excerpt(); ?> <div style="text-align:right">[ <a href="<?php the_permalink(); ?>">Далее</a> ]</div>
             </div>
             <div class="divider"> </div>
         </div>

     <?php endforeach; ?>