A doll is a child's toy that represents a baby or other human being, but includes likenesses of animals and imaginary creatures. Dolls have been around since the dawn of human civilization, and have been fashioned from a vast array of materials, ranging from stone, clay, wood, bone, cloth and paper, to porcelain, china, rubber and plastic. While dolls have traditionally been toys for children, they are also collected by adults, for their nostalgic value, beauty, historical importance or financial value. In ancient times, dolls were used as representations of a deity, and played a central role in religious ceremonies and rituals. Lifelike or anatomically correct dolls are used by health professionals, medical schools and social workers to train doctors and nurses in various health procedures or investigate cases of sexual abuse of children. Artists sometimes use jointed wooden mannequins in drawing the human figure. Action figures representing s