The sketch pad will probably need prior written approval from the prison - sending blank computer paper will be fine and YES he will be able to bring these possessions home with him.
https://www.inmateaid.com/ask-the-inmate/can-i-send-my-inmate-a-sketch-book-off-amazon-or-just-a-bunch-of-blank-computer-paper-so-he-can-draw-if-i-can-will-he-be-able-to-take-these-drawing-and-letters-i-send-when-he-leaves.amp#answer
Accepted Answer Date Created: May 26,2013