Lego. Then he can compete in his schools FLL competitions and be far ahead of the other kids on his team. I am a coach for this year's FLL team as well. No experience with the vex though.
Omg. We fight the damn battle every year as well for our son. They don't understand that the delivery systems are different. Well, they probably do, but don't care.
I used to love jamming to Stabbing Westward when I played Quake. You could even play a cd in the game through the console menu. Man I feel old. That is was in 1998!!