What is a 3d pen? 

A 3D pen can be placed in your palm and used to make 3D models. A 3D drawing pen is a tool that can create any shape you like. A 3D pen, the most recent innovation in arts and crafts , is an ingenious method to create art in 3D with the help of technology. Since their debut, 3D pens have grown in popularity with artists - because this technology is as close as you will ever get to expressing your thoughts and ideas in the real world! https://pick3dprinter.com/best-3d-pens/