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 of European Union and extra European flags in order to understand and recognize the flags of countries that are part of the European Union and Extra European countries and identify the right geographic position of them. There will be a total of 15 between EU and Extra EU flags. It will also serve to learn the European countries border and to understand the 3D printing technics.