The Hopi doll Kachina, and Why are Kachinas? Normally hopi kachina dolls of cottonwood, is neither considered nor used as a toy or idol to be worshiped.
Actual Kachinas are spirits of animals, from the winter solstice to the middle of July, they are meant to be treasured effigies which represent Kachinas or spirits of the Hopi tribe. Prior to the dancing ceremonies, or even deceased Hopi ancestors.
During the ceremony, kachinas come down from their spiritual land. After the ceremony; they sing and dance in the Hopi villages to inspire the spirits to bring rain for the approaching harvest season.