This is part of the series of 30 exercises developed during the 3D4KIDS program. One of the aims of this Erasmus+ program is to improve the knowledge of teachers regarding the 3d printing technology by developing some specific training materials. More info in the website: https://www.3d4kids.eu/ This project is about creating a more efficient human body. The students will think about how they can improve different parts of our body, in this case pelvis, in order to make easier childbirth. Then, they have to scale the idea to put it in a woman torso. It would be 3D-printed in an appropriate size.