Prismacolor colored pencils tips & techniques

http://www.youtube.com/watch?v=P5VIfFETIe8

related:

For Adults, Coloring Invites Creativity And Brings Comfort
June 11, 2015
http://www.npr.org/sections/13.7/2015/06/11/413603343/for-adults-coloring-invites-creativity-and-brings-comfort