3D Printing is a form of additive technology manufacturing. An object is built-up layer-by-layer rather than being carved or sculpted out of a larger block of material. A common analogy is to refer to a 3D printer as a robotic glue-gun: the 3D printer squeezes out or "extrudes" melted plastic through a heated tip, while the head moves back and forth to print out the design. As the platform that the model sits on lowers, the model builds up, layer-by-layer.
There are many public libraries across Ontario that offer 3D Printing. Check with your local branch for more information.
Some Ontario Colleges offer 3D printing services: