In the “last doll” ceremony of a traditional quinceañera, the honoree often receives a doll. The doll represents childhood and is presented as one of the celebration’s symbolic gestures.
The custom is commonly interpreted as showing that the honoree is leaving childhood behind as she enters a new stage of life. In some families, the quinceañera passes the doll to a younger sibling or child, making the transition especially visible during the ceremony.
This is a custom rather than a universal rule. Many contemporary celebrations omit it, adapt it, or replace it with another symbolic gift. A crown, Bible, bouquet, and other objects can also appear in quinceañera traditions, but they are separate elements and are not the object named by the “last doll” custom.