Tryfon

<style>
div{
	height:100px;
	margin-bottom:10px;
	transparent: .2s;
	}

	div:hover{
	height: 150px;
	}

	.red{background-color: red;}
	.blue{background-color:blue;}
	.green{background-color:green;}
	</style>


	<div class="red">
	</div>

	<div class="blue">
	</div>

	<div class="green">
	</div>