Click Cow to Change Size

by MegaScience

HTML

<input type="Checkbox" id="test" />
<div>
  <label for="test">Cow</label>
</div>

CSS

input {
  display: none;
}

div {
  background-color: red;
}

input ~ div {
  height: 50px;
}

input:checked ~ div {
  height: 100px;
}