Originally Posted by FlyingHoustonian

The odds of a kid falling into a "button" or something to that effect are almost nil. I have given many a cockpit tour during flight (in biz jets) and it never bothered me. Only one pilot is "flying" at a time so the other is free to assist as needed, even to show folks around.

The practice noted by the OP is prohibited by the FAA for commercial airlines IIRC. Not sure about Mexico.

I do find it curious that this would happen in North America though.

Ciao,
FH