Daniel would prefer to go on a school trip to Morocco than go to WDW with us in 2010, he would also be away for his 16th birthday.
Tell him the real Morocco is nothing like the Epcot one.
My 19 yr old son has cheerfully offerred to stand in for him on your 2010 trip. In fact he is willing to sacrifice himself to "fill in" for kids that no longer wish to have the Disney experience. He says he's hosebroken, eats light( which he does amazingly enough lol) and enjoys all the scream inducing rides that WDW has to offer.
Can you guilt him into going to WDW?
It's your 16th birthday, probably last family trip before you go off to (fill in appropriate plans), etc.
You know he'll enjoy himself once he arrives in Orlando.
You probably have it down to a science by now. ;)