Rendering child templates in parent

[Manaus]

Hello,

I have a page with children pages. Pages have parent.php and child.php as template files. I'd like to use child template in parent page to render the content, I tried

foreach ($children as $child): 
  $child->render();
endforeach;

but it did not work.

Tried also

foreach ($children as $child):
  include 'child.php';
endforeach;

without appreciable results.

Thanks for any suggestion!

[Manaus]

Got it, it was echo $page->render()