IMO, the Germans are very strict when it comes to "rules". Unless he looks 14 and is prepared to lie, I would not recommend it.
BTW, the simulator tour looks more interesting than the tour. I have been on Boeing's Everett tour and it was meh. Too many people, too much noise, zero time for questions. On the other hand, the Airbus swag looks awesome. I suggest you skip the tour and order on line.