In the last years, a lot of attention has been paid to the technology of the 3D printer since its availability for home and office use. The 3D printer allows for the making of objects by laying down plastic filament layer by layer. This project explores how different filaments and fill patterns affect the strength of a 3D printed object. For the experiments, I used objects made from the Solidoodle 2 Pro 3D printer. The two types of plastic filaments were ABS (acrylonitrile butadiene styrene) and PLA organic filament (polylactic acid); and I compared the strengths of linear, rectilinear, and honeycomb fill patterns..