Google has always included a nice easter egg and a hidden animation in all its Android releases. Android 4.4 KitKat is no different, with not one or two, but three different hidden animations.
The folks over at Android Central have shot a video showing off the the new hidden animations.
If you own a Nexus 5, head over to Settings -> About Phone and tap on ‘Android version’ a few times. Once the animated logo appears, long press on the screen and another animation with Android wrapped in KitKat will appear. Another long press, and you will get a grid of icons containing all the desserts after which different versions of Android were named.