C.C.
Hi. I might have an idea that worked for me. When I was nine, I lost both my parents in two separate incidences and was an only child. My life changed dramatically and I was passed around alot for a while. I eventually had to be placed in the foster system, but did have an aunt who was deemed too ill and old to take me, but she wanted me to know i was always there in her heart. She made me a jar, covered in stickers, ribbons, etc. and inside there were little colored scraps of paper that she had written little thoughts and things about our family and me. She had taken some photos as well and copied them onto paper, pics of her and I, my parents and me, etc. and they were in there too. I would get up each morning and the first thing I would do would be to run to that old jar and see what marvelous thing was written about me today. That jar got me over many rough days. Each year after that, every holiday season, she would send me a "refill" - little scraps of paper to put back in the jar. I still have the jar, and although she passed away many years ago, my family will still from time to time, drop a little something in it to remind me of them.
I was also thinking to help with the little scraps of paper, since there is not alot of history there yet, you could go online and search little kid inspirational sayings, jokes for kids, etc. It sounds silly, but it did work for me and I might as well throw it out there for you. You never know. Good luck and kudos for recognizing the problem and trying to help him through it. Make extra time for him, maybe pick him up after school once a week, meet him for lunch at school, call him just to say hi, etc.