1. A method for the manufacture of a model of a child's skull within the first year of a child's life, comprising the steps of: establishing shape characteristics of a child's skull from the group of features including the horizontal curvature of the forehead, the vertical curvature of the forehead, the width of the forehead, the fronto-nasal angle, the fronto-occipital diameter, the biparietal diameter and the horizontal radius of curvature of the occipital module, selecting one or more of the established features, preparing a three-dimensional model of a child's skull or parts from the skull from the selected features.