This course gives an introdutcion to SLS and FFF/FDM based 3D-Printing. Special attention is being made to the intrinsic advantages and disadvantages of 3D-Printing but concentrates on understanding 3D-Printing rather as a tool. You will be given advice how to cope with the anisotropic nature of 3D printed objects and how to produce in other materiality besides plastic. This can be done via casting different materials in 3D-printed molds or can be achieved via complex structures inside the object. This way you will be able to rather produce tools for production than simply clicking a button. At the end of this seminar every attendee has to solve a production relevant problem in the context 3D-printing and actually produce it on a prototypical level.