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 activity is about making some polygons with the given pieces. The same pieces may form several polygons. This is known as dissection. There are 4 possibilities given as examples: - Two triangles to square - Dodecagon to square - Hexagon to square - Hexagram to triangle (two versions)