What is 3D printer?
3D Printer is a printer that can print 3 dimension(3D). It using plastic to print things. It printing what you designed in some program like Blender or 123d design. It using the type of plastic that look like a small tube to print it. That tube is made out of the plastic waste and some people take it to make that small tube. The process is we send file to the printer then it using the laser light to melt the plastic and then it use that melt plastic to print what you want. The way they print it, was by layer by layer and they have some wheel to go where the face of the printing part want to go. The time it spend to print one thing is depend on how big it is.