What age can you just leave them to watch tv, play, read and just pop off for a little Saturday/Sunday afternoon nap without worrying that they will set the house on fire or cover every available surface in some horrid goo type substance.
My DD is only 5 and has just started getting herself cereal at the weekends but I am on high alert, I'm guessing somewhere in the region of 8-10? So I have a few years to go yet before nap time