Abstract: A method making a toy, doll, or mannequin wherein a relatively rigid core is covered with an elastic skin. The skin is bonded to the core in some areas but not others. This creates an expansible, variable volume pressurizable space between the core and the skin so that the skin may expand relative to the core to simulate weight gain or change of muscle tone. The method comprises selecting and/or treating the core so that only certain parts adhere to the skin-forming material, covering the core with a curable, skin-forming coating and allowing the material to form the skin that, after inflation, assumes a different size and/or shape than the core and thus simulates weight gain, change of muscle tone or other significant change of shape and appearance.