The question Are pilots allowed to let passengers fly the plane? is interesting to read, noting that pilots are permitted to allow passengers to fly.
I recall an Air Crash Investigation episode where the pilot pretended to allow his son to manipulate the controls of an airliner, without realising the autopilot had been disconnected, resulting in an accident.
I'm wondering how commonplace this is? Is this an isolated incident?
On the flip-side, I've heard of at least 3 occasions where passengers have successfully landed planes.