MC-XOBAHCK,
<style>
.skat {display:none; height: 50px; width: 50px;background:green;}
:checked + label + div {
display: block;
}
</style>
<input type="checkbox" id="my1"><label for="my1">Включить 1</label>
<div class="skat" id="block1"></div>
<input type="checkbox" id="my2"><label for="my2">Включить 2</label>
<div class="skat" id="block2"></div>