<?php
$id=get_the_ID();
$result = get_child_pages_by_parent_title('brushes');

foreach ($result as $xx) {
if ( $xx->post_parent==$id ){
echo '<div class="type-show">';

echo '<div class="img-show">';
if (has_post_thumbnail($xx->ID)){
echo get_the_post_thumbnail($xx->ID,array(200,200),array('class' => 'post_thumbnail'));
}
echo '</div>';

echo '<div class="title-show"><a href="'.($xx->guid).'">'.($xx->post_title).'</a></div></div>';
}}

?>