      <div class="caption">
        <h3>Paper</h3>
        <p>Material is the metaphor</p>


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    <div class="thumbnail">
      <div class="image">
        <a href="#readable/"><img class="img-responsive" src="https://bootswatch.com/3/readable/thumbnail.png" alt="Readable" /></a>
      </div>
      <div class="caption">
        <h3>Readable</h3>
        <p>Optimized for legibility</p>


      </div>
    </div>
  </div>

  <div class="col-lg-