Crear listado de páginas hijas en genesis

pagina-hija

<?php

// Template Name: Pages-hijas

remove_action('genesis_loop', 'genesis_do_loop');
add_action('genesis_loop', 'custom_loop');
function custom_loop() {
    global $post;
    $pageid = $post->ID;

    $args = array(
        'post_type'      => 'page',
        'posts_per_page' => -1,
        'post_parent'    => $post->ID,
        'order'          => 'ASC',
        'orderby'        => 'menu_order'
    );

    $my = new WP_Query( $args );

    while ( $my->have_posts() ): $my->the_post();

        global $more;
        $more = 0; ?>

        <div class="subpage-post">
            <div class="featured-image">
                <?php echo the_post_thumbnail( ‘thumbnail’ ); ?>
            </div>
            <h3 class="entry-title">
                <a href="<?php echo the_permalink(); ?>"> <?php echo the_title(); ?></a></h3>

                <div class="entry-content">
                    <?php echo the_excerpt(); ?>
                </div>

        </div>
        <?php endwhile;
        wp_reset_query();
    } ?>
<?php genesis() ?>