I've made use of Dynamic Drive's Shake Image Script to make the images, avatar icons and activity icons on my Moodle 1.9.15+ site go all wiggly. This is my innovation to make the Moodle interface more interesting and visceral.
Demo site:
http://www.moodurian.com
Username: student
Password: sudent
If you move your mouse cursor over your avatar's icon, it will come alive...I mean, wiggle.
The window below is LIVE. Do a mouseover on any one of the blue round icons.
See what I mean? Good.
Below is a screenshot not a live window. Just in case you didn't know.