http://learn.javascript.ru/play/bHvCJ
<!DOCTYPE HTML>
<html>
<head>
<style>
.main {
background: #AAA;
height: 200px;
padding: 20px;
width: 200px;
}
.main-child {
background: #DDD;
border: 1px solid red;
height: 50px;
width: 50px;
}
.main:hover {
background: #BBB;
}
.main:hover .main-child {
transform: scale(1.1);
-moz-transform: scale(1.1);
-o-transform: scale(1.1);
-webkit-transform: scale(1.1);
}
</style>
</head>
<body>
<div class="main">
<div class="main-child">Test</div>
</div>
</body>
</html>