For you, the SuperCub is the perfect plane to learn on. It is the easiest of all "real" R/C planes to fly. Remember the three basic rules: NO WIND; plenty of altitude to have time to correct mistakes (you must fly at least TWICE the height of the nearest obstacles like trees); stay far away from trees. For flying the SuperCub, you need an area at least 500'x500'.

The AirHogs AeroAce is a great little 2-channel plane for you to get your son started on. With the 2-channel planes, and particularly the small light ones like the AeroAce, there must be absolutely NO WIND. They are actually perfect for a large indoor area like a gym or barn. Altitude with a 2-channel plane is entirely controlled by throttle. If you give too much throttle, the plane will "porpoise". It tries to climb, stalls, starts to fall, regains flight as it picks up speed, starts to climb, stalls, and so on. To reduce its tendency to porpoise, add a little weight to the nose.
you can tape a dime to it or insert a screw, but be careful not to damage the battery. Also, learn to back off on the throttle, flying the plane at part throttle is best. The AeroAce, which comes in several body styles, is the only plane sold in the toy stores and department stores that is worth buying.

As you and your son get better, you should check out the micro flyers from ParkZone. They are not for beginners, but once you know the basics, they will fly much better for you and your son than the AeroAce. They also cost a lot more, and are not virtually indestructable, the way that the AeroAce is. When the AeroAce first came out a few years back, it became immensely popular. We used to do stupid things with it like bouncing it off the backboard and trying to get it into the basketball hoop; bouncing it off the walls and trying to get it flying again before it hits the ground; combat, but not by trying to hit the other plane but by trying to hit the other flyer; trying to land it on your own head, etc.