An exemplary display system is disclosed, which includes a display wall having a plurality of slots; a plurality of removable shelves, each removable shelf insertable into a slot of the plurality of slots; a plurality of unique identifiers, each unique identifier coupled to a corresponding removable shelf; a fixed shelf having an embedded or attached sensor; and a user-interactive visual display. Various systems display plumbing fixtures. In exemplary embodiments, the unique identifiers are implemented using RFID tags.