The 3D printer is THE quintessential prototyping system. Using the additive production method, you can always achieve a rapid prototyping of any CAD model. 2 types of materials are available: "ABS" Plastic (Acrylonitrile Styrene Butadienne) is the most used compound. It is particularly found in LEGO bricks design. "PLA" plastic (Polylactic Acid) is itself a "vegetable", biodegradable and environmentally friendly compound.