Welding 3D prints with 3D pen sample for test

Have you ever wonder how to connect 3D printed parts? Glue and tape are not good for you? How about welding them with 3D pen/3D doodler? That's by far the best way to connect 3d printed parts for me. It is strong, reliable, simple and clean. Of course to mkae it you need a 3D pen, below you can find link to few of them. Don't worry you don't need to have any welding knowledge or experience, it is simple. You also don't need to use any special type of filament. They are just few rules that you sh