Parents should understand that the buildings at NIU are open to the public. Young children should be supervised at all times; older children should be picked up promptly after lessons and classes and should not wander through the buildings. There is no longer a pay telephone in the Music or Art Buildings. There is a phone that can be used for local calls only (free) on the west wall of the Concert Hall hallway and there is a phone that can be used for on-campus calls, including the university police, on the east wall of the Concert Hall hallway. Both of these phones are located in the Music Building.