显示页面摘录

I've one page (mother page) where display child pages, but i can't display the excerpts from child page, the structure is:

• Title
• Thumbnail
• Excerpt
• Read More (link to page)

My code is:

<?php
$pages = get_pages('child_of='.$post->ID.'&sort_column=post_date&sort_order=asc&parent='.$post->ID);
foreach($pages as $page) {
?>
<div class="block-left" id="<?php echo $page->post_name; ?>">
    <h3><a href="<?php echo get_page_link($page->ID) ?>"><?php echo $page->post_title ?></a></h3>
    <?php echo $page->post_excerpt ?>
</div>
<?php } ?>

But <?php echo $page->post_excerpt ?> Not work :(

Any idea? In advance, thanks :)