A doll is traditionally presented to a quinceañera in the “last doll” ritual.
The doll represents childhood and is called the last doll because the ceremony symbolically marks the celebrant’s movement toward a more mature stage of life. A parent or another relative may hand it to her during the reception, sometimes as part of a formal presentation or a sequence of symbolic gifts.
The ritual is related to the broader idea that the fifteenth birthday marks a transition. It does not mean that the celebrant literally stops being a child on that day, nor does every family include the custom. Many modern quinceañeras replace the doll with another meaningful keepsake or omit the ritual entirely.
The doll should not be confused with a tiara, bouquet, or other accessories that may also appear in a celebration. Customs differ by country, family, and generation, but the “last doll” is the established name for this particular childhood-symbol ritual.