I am not sure I understand the question...
We bought a graphics tablet for my daughter for about a hundred bucks. It comes with a pressure sensitive pen (the harder you push down, the darker the line). There are much more expensive versions... I am pretty sure that professional artists and graphic designers use these.
My daughter was able to do very nice drawings.
Later my son got one of those combination tablets/laptops (you can detach the keyboard and just use the touch screen as a tablet). This also came with a pressure sensitive pen which he also used for drawing.
I would go to Best Buy and try out the graphics tablets. See if you like them.