3D Pens

3D pens, also known as 3D printing pens, are handheld devices that heat plastic filament to create three-dimensional objects. Think of it as being very similar to a hot glue gun. But instead of glue, plastic flows out. The pen has a button that pushes molten plastic out of the tip. As the filament passes through the pen, it melts and flows out of the tip, where it cools and solidifies into the shape being drawn.