Make mulitple divs line up next to each other inside parent div - html

Question

I've searched the many similar questions like this, but none of the solutions are working. It should also be noted that I am using twitter bootstrap. I want a bunch of divs to span the entire length of the parent div at the bottom of it. I have tried putting them inside a div that text-align:center and then using float-left inside the gridPics class, and using display: inline-block, text-align :left and nothing seems to do it. The two in the example below are in the exact same spot, and I want them side by side. Here is what I have:
HTML:
<div class="row-fluid">
<div class="span8 offset2 articleContent">
<!-- These are the divs to span across, when it works there would be more than two -->
<div class="gridPics"></div>
<div class="gridPics"></div>
<!-- They will also go over this image -->
<img id="sidePic" src="img/about/aboutHeader_Mid1.png" alt="about">
</div>
<div class="span2"></div>
</div>
CSS:
.gridPics{
position: absolute;
z-index: 1;
width: 10%;
height: 20%;
background: #0000b3;
bottom: 0;
float: left;
}
.articleContent{
position: relative;
box-shadow: 0 0 5px 5px #888;
}
#sidePic{
position: relative;
z-index: -1;
}
Here is where I am doing this, the blue divs would be pics (akin to thumbnails) that can be clicked. I want them to go all the way across:
/ScreenShot2013-01-09at85450PM_zps550e8e4a.png[/IMG]

Answer 1

Here's a fiddle:
http://jsfiddle.net/pureux/Er9eG/
You need a container for your gridPics and have it be absolute positioned (instead of the gridPics) at the bottom. Then float the gridPics inside of the container.
.picContainer {
position: absolute;
bottom: 0;
left: 0;
width: 100%;
min-height: 50px;
}
.gridPics {
width: 50px;
height: 50px;
float: left;
display: block;
margin-right: 4px;
margin-top: 4px;
}

Answer 2

Is this what you're trying to do:DEMO
HTML
<div class="row-fluid">
<div class="span8 offset2 articleContent">
<div class="gridPics"></div>
<div class="gridPics"></div>
<div class="clear"></div>
<img id="sidePic" src="img/about/aboutHeader_Mid1.png" alt="about">
</div>
<div class="span2"></div>
</div>
CSS
.gridPics{
width: 10%;
height: 20px;
background: #0000b3;
float: left;
border:solid #FFF 1px;
}
.articleContent{
box-shadow: 0 0 5px 5px #888;
}
#sidePic{
z-index: -1;
}