The world completely tunes and loaded with futuristic technology to beat the people expectations. Nowadays, the Smartphone rule the entire new and old generation people and without Smartphone there’s nothing to proceed further.
3d pens are unique handheld drawing tools and 3D printers rolled into one device. They draw in 3D and printing simultaneously. They are very much like the mechanical pencils only the lead is replaced with ABS or PLA plastic filaments