Select a div inside a div
<p>I have a div inside a div:</p>

<pre><code>&lt;div id="big"&gt;
&lt;div id="small"&gt;&lt;/div&gt;
&lt;/div&gt;
</code></pre>

<p>They have <code>display: none;</code></p>

<p>A button calls the div inside with jQuery:  </p>

<pre><code>$("#button").click(function() {

    $("#small").fadeIn("normal");

});
</code></pre>

<p>Why it don't works? I don't understand?</p>

<p>I also try so many things: </p>

<pre><code>$("#big #small").show();
$("#big &gt; #small").show();
$("#big").children().show();
</code></pre>
