First of all go to the playstore of android phone and in the top searchbox type "Kika Emoji Keyborad" You will see a list of apps in dropdown...
Now click on the app named as "Emoji Keyboard-Cute Emoticon"...
After clicking you will see a screen as shown below. Click on Install button to start installation in your android phone...
After clicking on install button, your app will start downloading just like below image..
Now staying on the same screen you will see a button "Open" Click on it to open the app...
Or you can go out of playstore and in your smartphone click on kika app icon to open it......
Enjoy it......... :)