3D printing has made it easier to bring new ideas to life. You don’t always need a big 3D printer to start prototyping. Take the CoLiDo Pen for instance. It is a 3D printing pen that lets you bring your design to life by drawing it. The device is portable and light. It has fast and slow modes. The print-head has a stable temperature throughout the process and slides up when the 3D Pen is not in use.
You can use PLA or ABS filament to start printing. The above video should give you a better idea how this 3D pen works.