This is part of the series of 30 exercises developed during the E3D+VET program. The aim of this Erasmus+ program is the immersion in 3D printing of VET centres (website: ). The exercise is composed by 3 geometrical pieces with different shapes and difficulty levels: • Piece 1, easy level • Piece 2, medium level • Piece 3, hard level These pieces can be stored by putting them together forming a cube.