Ah, but I said that they read to their level. This includes their interest level. Jackie Collins stuff might be readable for a third grader (US school level), but I don't think that there are many third graders who would be interested. On the other hand, I have a 10 year old nephew who has read (himself!) all of the HP books and has enjoyed them; he eagerly awaits the next one. If he doesn't understand it, he told me that he either asks his mom ("Dad would make something up, like you do") or he will "skip over it, especially if it's mushy stuff."

That said -- I really have to applaud, both personally and professionally, anyone who takes the time (and cares enough) to watch what their kids are reading (or watching, or listening to, or doing).