Happy Mask Salesman's Organ

The is an object in Majora's Mask.

History
After Link regains the Ocarina of Time from the Skull Kid and uses the "Song of Time", the Happy Mask Salesman uses the Organ to teach the young hero the "Song of Healing". After playing the song for himself, Link reverts back to his human form, encasing the Skull Kid's curse in the form of a mask. The Happy Mask Salesman's Organ is never seen again after this.