The fischertechnik parts program is already quite extensive as standard. But for some next-level-fischertechnicians,it is not nearly extensive enough sometimes. For those who want to experiment and build with this construction system without compromises, designing and manufacturing parts themselves offers a valuable extension. In the overview below an anthology of custom-made gears, building blocks or other 'passive' parts that can be used with the fischertechnik system. The electronics modules, microcontrollers and sensors are on this page, or click through to the custom-made figures in scale 1:10.