Sounds like you and him could have some great fun. As I'm sure others are going to suggest PLANES to get, why not consider an [link=http://Irvine Pixie]Irvine Pixie Glider (4th one down on the left column)[/link]. They use a very simple two channel rudder and elevator control system and it is very good for a way into gliding or powered flight because it will help build up an understanding of the aerodynamics involved in flying. If not a glider, what about a heli? The Hirobo XRB SR Lama is a very recommendable beginners heli, and, while not directly helping him fly PLANES, it will give him skills which are needed and the XRB is the simplest heli out there which is very easy to fly and is designed to be flown inside, ie. in his bedroom. Just a few suggestions. If he is set on fixed wing powered flight then the Multiplex Space Scooter is a very good beginners electric plane with a 3 channel control system, an all inclusive deal and being made out of the almost invincable foam material for WHEN he crashes.

Hope that helps!
Chris