Actually, no. My son and I play with the Air Hogs RC planes and helicopters. The planes are dead simple and indestructable, the best is the Aero Ace biplane. We're got two of those now. We've also got the jet, which is basically a pointy monoplane which can loop easily. We're out flying these every week, and he has an absolute blast. I know they're rated for 8 and up, but the controls are so simple, he can fly incredibly well, especially since he's only 4! We also have a few RC cars, but they don't deliver the same thrill that the planes do. The key with the planes is to research online and find one that actually works. Some of them are just plain crap.
Now, I wouldn't trust him with my big RC SuperCub, but that's a LOT faster and more complicated.