Most are gourds. But a lot of people call them mini pumpkins. Kids like to paint them because of their size. They are mainly used for fall decorating. When kept out of direct sunlight or in a cool area they should last for months. To also help preserve them, wash them when you get home, then spray with clear acrylic. Not edible.
Miniature Pumpkin Varieties:
Orange colored varieties include Jack B. Little pumpkin, also called "JBL", and Wee B. Little. White-colored miniature pumpkins: "Baby Boo pumpkins" and "Casperita".