title: Admob with designed for families not showing ads
body: <p>I want to add my app to "Designed for families", but for mixed audience, so as <a href="https://support.google.com/admob/answer/6223431?hl=en" rel="nofollow noreferrer">official documentation</a> said I change my ads request like this:</p>
  
  <pre><code>Bundle extras = new Bundle();
  extras.putBoolean("is_designed_for_families", true);
  AdRequest adRequest = new AdRequest.Builder()
              .addTestDevice(AdRequest.DEVICE_ID_EMULATOR)
              .addNetworkExtrasBundle(AdMobAdapter.class, extras)
              .tagForChildDirectedTreatment(true)
              .build();
  </code></pre>
  
  <p>The problem is that when I put the "is_designed_for_families" extra, no ads is displayed.</p>
  
  <pre><code>W/Ads: Failed to load ad: 3
  </code></pre>
  
  <p><strong>Update</strong>: I know that error 3 means that admob doesn't have an ad to show at the moment, but I have set "test device" so it should show test ads.</p>
  
  <p>I haven't marked as "Designed for families" in Google Play yet, because I want to check that the ads are displaying correctly.</p>
  
  <p>Any ideas about what is happening?</p>