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Exercise not validating

See original GitHub issue

Challenge http://www.freecodecamp.com/challenges/waypoint-target-a-specific-child-of-an-element-using-jquery has an issue. Please describe how to reproduce it, and include links to screenshots if possible.

The exercise seems broken:

Objectives:

The second element in each of your well elements should bounce.
You should use the :nth-child() function to modify these elements.
Only use jQuery to add these classes to the element.

<script>
  $(document).ready(function() {
    $(".well:nth-child(2)").addClass("animated bounce");
  });
</script>

<!-- You shouldn't need to modify code below this line -->
<div class="container-fluid">
  <h3 class="text-primary text-center">jQuery Playground</h3>
  <div class="row">
    <div class="col-xs-6">
      <h4>#left-well</h4>
      <div class="well" id="left-well">
        <button class="btn btn-default target" id="target1">#target1</button>
        <button class="btn btn-default target" id="target2">#target2</button>
        <button class="btn btn-default target" id="target3">#target3</button>
      </div>
    </div>
    <div class="col-xs-6">
      <h4>#right-well</h4>
      <div class="well" id="right-well">
        <button class="btn btn-default target" id="target4">#target4</button>
        <button class="btn btn-default target" id="target5">#target5</button>
        <button class="btn btn-default target" id="target6">#target6</button>
      </div>
    </div>
  </div>
</div>

I have also tried the below:

<script>
  $(document).ready(function() {
    $("#left-well:nth-child(2)").addClass("animated bounce");
    $("#right-well:nth-child(2)").addClass("animated bounce");
  });
</script>

Neither validates the first objective of the exercise.