He is talking about five years old. Kids who learn to read, read slowly at first. Very very slowly and with a lot of effort. And by the time they finished long sentence, they have no idea how that sentence started. This period is notfun, because they cant do it yet. This period also takes a lot of time, it is long enough with 6-7 years old and even longer with five years old.
The interesting stories as motivator works for kids that already know how to read and need just some more practice. And when the books the child is inclined to read are already collected and available - when the kid is starting, it takes multiple attempts to figure out what it is that child will like.
