An assembly (3) comprising at least a first module (1) and a second module (2) with respective longitudinal axes (5) is described. Each one of the modules (1, 2) comprises a connection side (6, 7, 8, 9) which is facing the other module (1, 2) and is arranged between the upper side (6, 7, 8, 9) and the underside (20, 42), and at least two elongated bendable members (12) which connects the first module (1) with the second module (2). The first module (1) comprises at least a first connection side (6) which comprises a first recess (13) which is a part of a rotationally symmetrical form with a symmetry axis (43) which is parallel with the connection side (6). The assembly (3) comprises at least a first connection member (17), which comprises an inelastic member (22) and a longitudinal axis (35) which is parallel with the symmetry axis (43), and which is in engagement with and rotatable around the symmetry axis (43) in relation to the first recess (13).