I understand all children are different. What gets one child's attention may not necessarily get another's. As James Dobson said, some children come out of the womb shaking their fists. Their agenda is not whether they will someday be in charge but when. As family lecturer Gary Smalley said, they grow up letting you live in your house.
Children are unique.
I raised him exactly the way I raised Rosie and Freddy. That may be part of the problem. It is a precious promise, but we need to cling not to just the last half of the verse. The first part tells us we need to train up a child in the way he should go, that is, toward the bent of his personality. Rosie is Rosie.