Android hidden easter eggs

Android version 4.1.1
How to display :
Settings > About phone > press Firmware version multiple times really fast, you will get the image as below

Then you can play with it by moving the beans around.

Android version history and their API level numbers

For easy reference, here is a list of Android version and their API level numbers : 

 

Android 1.0	(API level 1)
Android 1.1	(API level 2)
Android 1.5 Cupcake	(API level 3)
Android 1.6 Donut	(API level 4)
Android 2.0 Éclair	(API level 5)
Android 2.0.1 Éclair	(API level 6)
Android 2.1 Éclair	(API level 7)
Android 2.2–2.2.3 Froyo	(API level 8)
Android 2.3–2.3.2 Gingerbread	(API level 9)
Android 2.3.3–2.3.7 Gingerbread	(API level 10)
Android 3.0 Honeycomb	(API level 11)
Android 3.1 Honeycomb	(API level 12)
Android 3.2–3.2.6 Honeycomb	(API level 13)
Android 4.0–4.0.2 Ice Cream Sandwich	(API level 14)
Android 4.0.3–4.0.4 Ice Cream Sandwich	(API level 15)
Android 4.1–4.1.2 Jelly Bean	(API level 16)
Android 4.2–4.2.2 Jelly Bean	(API level 17)
Android 4.3–4.3.1 Jelly Bean	(API level 18)
Android 4.4–4.4.4 KitKat	(API level 19)
Android 4.4W–4.4W.2 KitKat, with wearable extensions	(API level 20)
Android 5.0–5.0.2 Lollipop	(API level 21)
Android 5.1–5.1.1 Lollipop	(API level 22)