Many of the available elements can have a displaying animation associated. If so, the element will be hidden by default, and will only be displayed when the user scrolls the page until it fits on the viewport. Check out some examples.

Iconbox
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod.
Step 1
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod.
Step 2
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod.
Step 3
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod.