Puppetry is a form of theatre or performance that involves the manipulation of puppets—inanimate objects, often resembling some type of human or animal figure, that are animated or manipulated by a human called a puppeteer. Such a performance is also known as a puppet play. The puppeteer uses movements of her hands, arms, or control devices such as rods or strings to move the body, head, limbs, and in some cases the mouth and eyes of the puppet. The puppeteer often speaks in the voice of the character of the puppet, and then synchronizes the movements of the puppet's mouth with this spoken part. The actions, gestures and spoken parts acted out by the puppets are typically used in storytelling. There are many different varieties of puppets, and they are made of a wide range of materials, depending on their form and intended use. They can be extremely complex or very simple in their construction.