Just came across this on a different website. Some of you may already know about the Easter Egg in various android builds. For those who don't read on and have fun.
1. Go to system settings, about phone.
2. Tap repeatedly on the "android version"
3. See the Ice Cream Sandwich Android
4. Long press on the Android
5. Watch him grow then the animation will start.
6. Rotate the phone and/or slide out the keyboard to see the direction change.