Depending on the aircraft, he *could* put it on autopilot and step away for a little while. I've read of simmers doing transoceanic flights, step away for several hours then come back to it. But, there's no telling if something could need attention while he's away and things go haywire.
Dad, my advice is stop calling it a *game*, get it in your head that it's a *simulation* and let him go. :cool: You could have a future Delta captain sitting there.
If he really wants to get serious about it I can give you links to several publications on the FAA web site. It is all pertinent to any flight simulator and will allow him to self-study. Just let me know. As FYI, I'm a private pilot in real life.