$children = get_term_children($wp_query->queried_object->term_id, $wp_query->queried_object->taxonomy);

                                if($children){
                                    //print_r($wp_query->posts);
                                    foreach($children as $subcat){

                                        $term = get_term($subcat,$wp_query->queried_object->taxonomy);

                                        $IDs = '';

                                        $args = array(
                                            'post_type' => 'product',
                                            'posts_per_page'=>3,
                                            'product_cat' => $term->slug
                                        );
                                        $sub_query = new WP_Query( $args );

                                        // The Loop
                                        if ( $sub_query->have_posts() ) {

                                            ?>

                                                <h2><?php echo $term->name; ?></h2>

                                            <?php

                                            $link = get_term_link($term->term_id,$wp_query->queried_object->taxonomy);

                                            while ( $sub_query->have_posts() ) {
                                                $sub_query->the_post();

                                                $IDs .= ",".$post->ID;
                                            }

                                            echo do_shortcode('[products ids="'.$IDs.'"]');

                                            ?>

                                                <a href="<?php echo $link; ?>" class="all">View All <?php echo $term->name; ?></a>

                                            <?php
                                        }
                                    }
                                }