A shelf (130, 140) unit for a kiosk which is configured to display items includes a plurality of dividers (132, 134) which maintain the items in respective positions on an insert (135, 145) disposed within a recessed top surface of the shelf (130, 140). The insert (135, 145) includes a magnetically permeable material. A magnetic attraction exists between the dividers (132, 134) and the insert (135, 145) to secure the dividers (132, 134) in position. The dividers (132, 134) are movably positionable on the insert (135, 145), with each of the dividers (132, 134) including a magnet and shielding material. The shielding material redirects magnetic flux emanating from the magnet toward the insert (135, 145). The items are seated between the dividers (132, 134) on the insert (135, 145).