title: Wagtail: Display a list of child pages inside a parent page
body: <p>In Wagtail CMS, I'm trying to create an index page that will display a list of all its child pages along with a featured image associated with each child page.</p>
  
  <p>I have created these two page models in models.py:</p>
  
  <pre><code>class IndexPage(Page):
      intro = RichTextField(blank=True)
  
      content_panels = Page.content_panels + [
          FieldPanel('intro', classname='full'),
      ]
  
      subpage_types = ['myapp.ItemPage']
  
  
  class ItemPage(Page):
      representative_image = models.ForeignKey(
          'wagtailimages.Image',
          null=True,
          blank=True,
          on_delete=models.SET_NULL,
          related_name='+'
      )
  
      body = RichTextField(blank=True)
  
      promote_panels = Page.promote_panels + [
          ImageChooserPanel('representative_image'),
      ]
  
      content_panels = Page.content_panels + [
          FieldPanel('body', classname='full'),
      ]
  </code></pre>
  
  <p>In the template index_page.html, I added the following code:</p>
  
  <pre><code>&lt;div class="intro"&gt;{{ self.intro|richtext }}&lt;/div&gt;
  
  {% for page in self.get_children %}
    {{ page.title }}
    {% image page.representative_image width-400 %}
  {% endfor %}
  </code></pre>
  
  <p>This displays all of the child page titles, but not the images.  Is it possible to retrieve the image fields for the child pages?</p>