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 about the cylinder LEARNING OBJECTIVES • An equilateral cylinder • An axial cross-section • Calculating the high, radius, surface and volume of the cylinder