Are you handy with a computer?
My cousin got married recently and her sister compiled a load of photos onto DVD. She played them in succession up on a big screen, zoomed in and out, had some appropriate background music, etc. It was incredibly cool. I understand that it took FOREVER to do, but the end product was spectacular.
You could collect photos of him from birth up to present day and make a 10 minute piece, all in chronological order. Then include family shots from when he got married to pictures of you (and siblings, if appropriate).
Anyway, I'm not sure I've explained that very well, but I hope you get the gist!