Free coloring Book

Download a free, 11 meg PDF, Coloring Book, for free, containing 16 pages of weird patent drawings, for free, from the National Archives Aotus Blog.
Did I mention it's free? It is.

More coloring... At the link below is a list with links to 44 institutions like libraries, schools, and professional groups, offering free coloring books you can download.

http://www.openculture.com/2017/02/free-coloring-books-from-world-class-libraries-museums.html

Even more free coloring books which can be downloaded from eight pages of museums, libraries, universities, and hospitals. Keep 'em busy on those cold winter days.

http://library.nyam.org/colorourcollections/

I like coloring.