In this paper the development of a P6 child dummy model for the multi body system (MBS) program "MADYMO-3D" is demonstrated, thus making possible the evaluation of the results obtained during the simulations with the model. The P6 model was developped in cooperation with TNO on the basis of technical drawings, measurements on the dummy and the P3/4 model. The data base is constructed according to the P3/4 model for compatibility reasons of the child dummy data bases. The P3 model was developping during the genesis of the P6 model. The basis for the tuning of the P6 model are sled tests for frontal and side impact, three of each, which were carried out with the P6 child dummy on the pneumatic test device. These tests were subsequently simulated on the computer, the parameter were tuned and the P6 model validated.