CSS3 Fading Panel (v2)
Here is the new version of a creation I've made few days ago. looks nicer, works better.
This creation used transition/animations, and works with checkboxes. As you can see, all images contain the label of checkboxes and are invisible. When input[type=checkbox] is :checked, the image appears with a little bouncing effect created with a cubic-bezier transitions.
Look at the code to understand how it works.