Bootstrap Tutorial - Css3 Button Grow Bootstrap Btn Group

The following code shows how to css3 Button Grow Bootstrap Btn Group.
Example

<!--Code revised from
http://fiddle.jshell.net/3c68Y/8<!--from  w w w .  j  a va2s  .  c o  m-->
-->
<!DOCTYPE html>
<html>
<head>
<script type='text/javascript'
  src='http://code.jquery.com/jquery-1.9.1.js'></script>
<link rel="stylesheet" type="text/css"
  href="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
<script type='text/javascript'
  src="http://netdna.bootstrapcdn.com/bootstrap/3.1.1/js/bootstrap.min.js"></script>
<style type='text/css'>
body {
  margin: 50px;
}

.blocks .btn-primary {
  padding: 24px 12px;
  margin: 0 5px;
  border-radius: 3px;
}

.filtertitle {
  margin-bottom: 30px
}

.large sup {
  font-size: 50%;
  font-style: italic;
  color: #aac8ff
}

.btn-group span {
  position: relative;
  z-index: 2;
  text-shadow: 2px 2px 4px #333333;
}

.large {
  font-size: 1.8em;
  padding: 0;
  float: left
}

.btnimg {
  position: absolute;
  top: -40px;
  right: 2px;
  z-index: 1;
}

.grow {
  display: inline-block;
  -webkit-transition-duration: 0.3s;
  transition-duration: 0.3s;
  -webkit-transition-property: transform;
  transition-property: transform;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
  box-shadow: 0 0 1px rgba(0, 0, 0, 0);
}

.grow:hover, .grow:focus, .grow:active {
  -webkit-transform: scale(1.1);
  transform: scale(1.1);
}

.btn.active, .btn:active {
  background-color: #879c12;
}
</style>
<script type='text/javascript'>//<![CDATA[ 
$(window).load(function(){
var initialSet = $("label.active").children("input").data("brush");
$("#results").html("Get Results for : " + initialSet);
$('input[name="options"]').change( function() {
    $("#results").html("Get Results for : " + $(this).data("brush"));
});
});//]]>  
</script>
</head>
<body>
  <div class="container">
    <h4 class='filtertitle'>CHOOSE BRUSHES</h4>
    <div class="btn-group btn-group-justified blocks"
      data-toggle="buttons">
      <label class="btn btn-primary grow active"> 
      <img src="http://placehold.it/30x30" class="btnimg">
        <input type="radio" name="options" data-brush="child"> 
        <span class='large'>Child</span>
      </label> <label class="btn btn-primary grow"> 
      <img src="http://placehold.it/30x30" class="btnimg">
        <input type="radio" name="options" data-brush="teen">
        <span class='large'>Teen</span>
      </label> <label class="btn btn-primary grow"> 
      <img src="http://placehold.it/30x30" class="btnimg">
        <input type="radio" name="options" data-brush="adult">
        <span class='large'>Adult</span>
      </label>
    </div>
    <hr>
    <span id="results"></span>
</body>
</html>
Click to view the demo