kenausril, I had this done for 3 days and the worst thing was the boredom & trying to sleep at night with a light shining on me. I had a TV so that helped but take other things to do...maybe somehow you can hook up a laptop (or there's battery), some magazines he likes, crossword puzzles, paper & pencils, does he have an I-pod?. I'm sure theres other things to take but I can't think. Also take an eye mask or something, to put over eyes if he wants.
Good luck to your son