The CAD program RAMSIS was developed for ergonomic formulation of car packages. The computer aided resource made it possible to create a real geometric and kinematic model of the human body. By using this model, the designer does not have to think about the posture of a person in a certain situation, because RAMSIS is able to prognosticate the natural estimated posture automatically. Furthermore, it is possible to rate the posture under comfort and health aspects. The research could be made with the male and female body types, including the individual adjustment of body height, corpulence and proportion. In addition, the body of a child, subdivided in different age groups, was developed and designed. In developing the child model, the first question that has to be clarified is the one about a suitable database. One problem is that most databases provide just values of about 50 % body segments. And those values are not suited to build a dummy of a real person. On the other hand, the measurement of a survey that is big enough to get a sound statement would have been too expensive. So it was decided to use the following procedure. First by making a literature enquiry the found values of a 50 % child were transferred onto the model to get a first impression of a child dummy. By doing this, dummies were formed for the age of 3 yr to 12 yr. It was decided to build a unisex model due to the fact that differences between boys and girls bodies are not so significant up to the age of 12. Another database that was found is the Tanner study, documenting the growth of 54 children by measuring and taking 2 pictures of them each year from the age of 3 to the age of 18. Those pictures were scanned into the computer and the 50 percentile child dummies of the corresponding age were obtained. This was done using the stereophotogametric anthropometric measuring program PCMAN. The anthropometric data were worked up statistically, so that the reproduction of a real test person was found to be nearly similar to the 50 percentile child.