My nieces came to spend several hours with me today. They are 7 and 9, so it was hardly onerous. They are old enough to occupy themselves, and they are girls so it doesn't involve treating a variety of household articles like softballs. No lamps were broken. I learned a little about the world of Webkins, and they learned as the youngest one said that "cats aren't at all like dogs".
Every time I have this privilege, I reflect on the discipline and sacrifice that I haven't experienced as a result of being childless. I've bought into the deception that my time is my own. My role within the evangelical organization I work for has a degree of autonomy. Most evenings I have no-one telling me how to spend my time.