Although in most cases we use instruments to construct our drawings, a good designer needs to be well trained in freehand sketching as well. Freehand drawing may prove to be a challenge for students with starting artistic background, particularly if these involve 3D shapes. The following exercises are aimed to train you in 3D freehand drawings. Draw the blocks shown below in either isometric, oblique or planometric freehand drawings. You will need to estimate any missing dimensions and draw well-proportioned solutions.