The Inventory button.
The inventory is a feature where items that have been purchased, won, or otherwise obtained, but have not been placed, appear. The items can be characters, shops, decor, backgrounds, roads, and construction bundles. Most items in the inventory are awarded in the Balloon Pop, Equestria Girls, and Minecart minigames, but items can also be added to the inventory if an update moves them from one location to another after the player has obtained and placed them, and certain decor items are added to the inventory instead of being sold. Like the sections of the store, each location has its own inventory.