The subject of this article or section is part of Children's Week, a seasonal event that lasts one week. Once the event has run its course, this will no longer be available until next year, but there are no guarantees.
Hotfix (2009-04-30): "If a player loses their Orphan Whistle at any time during the in-game Children's Week event they can speak to a Matron in cities to receive a replacement. Players can now obtain another orphan whistle from an orphan matron, even if they have completed all the associated orphan's quests."