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/ The lesson is about designing and printing a compass in order to know how to orientate in the geographical space by using mental maps and cardinal points. Locate on the maps the main physical geographic "objects" (mountains, rivers, lakes ...) and anthropic (cities, ports and airports, infrastructures ...) through the use of the compass.