Music box

A music box is an item obtained from either Katie in and  or Cyrus in. It is a square box that will play the main theme of Animal Crossing when opened.

In Wild World and City Folk
In Wild World and City Folk, obtained from Katie after returning her to her mother, Kaitlin, in another town. After escorting her back to her mom, she will mail the player a gift, containing one of nine exclusive items, one of which being a music box.

In New Leaf
In New Leaf, the music box can be obtained from Cyrus after bringing him a giant clam shell and a song. After half an hour, he will return a music box to the player.