Image may be NSFW.
Clik here to view.
Clik here to view.

Here's an animation we did as part of Babycub's branding effort.
Plínio, the bear, would rest on the logo's B and take a nap – see it in context on our test site http://babycub.niramekko.com.br. On the site, Plínio also jumps as the sites chooses which animated gif to show randomly :)
Of course, it should be simple so as not to distract users from the main purpose of the site which was to get people to subscribe to the service.