RepRap

Reprap is a 3D printer that can make other 3D printers. It's like a type of self-copying machine. A reprap can read a computer file and turn it into a physical 3D object made up of plastic, metal or other materials. So, with a reprap 3D printer you can make objects from your computer that can be used for things like hobbies, models, and even making products for sale.