There Day is a wonderful game that simulates life on a farm and already has millions of downloads in the world. It was created in 2012 by Supercell, and in this one you will have to manage your own farmer businesses until you have the most prosperous farm in town. In this game you must pay attention to some papers called expansion permits, which will serve you for something important. We will explain about this below.
Find in this video all about extension permits for Hay Day buildings
For more information you can read this post.