Not one of the parents of the Gedolim of this or previous generations brought up their sons to be Gedolim. They tried to bring them up as Ehrliche Yidden.
from Revach.net website
Chinuch: Raising Adults From Belz to Vizhnitz and Beyond…
“For I have made Paroh and his servants hearts heard in order to place my signs in their midst. And so that you may relate in the ears of your son and your son’s son etc. and you will know that I am Hashem” Why does the pasuk say, “and you will know that I am Hashem” – it should have said, “And so that you may relate in the ears of your son and your son’s son etc. and they will know that I am Hashem”?
The Belzer Rav answers; there are parents that want the best for their children. They will send them to the best Yeshivos, make sure they are learning well by having the best tutors for them, and always keeping them in the frummest surroundings…. .
However, the parents themselves want to keep their old life style. They won’t open a Sefer to learn. They won’t come on time to davening etc. They will just push their children to do so. This, says the Belzer Rav, will not work. If one wants his children to be Ehrlicher Yidden, he must be Ehrlich himself and let his children follow his lead. “In order that you may relate in the ears of your son and your son’s son” – to transmit the Torah to them… “you must know that I am Hashem” – First you yourself must recognize Hashem and then it will be transmitted to your children!
The Vizhnitzer Rebbe was once asked what is correct approach for father to deal with his little children during a long davening? The Rebbe answered that he has seen two approaches that share a common result. One father davens with great kavanah while his kid runs around like a “Vilde Chaya”. The other father spends a good portion of his davening catching up on the week’s gossip but he makes his child sit in his place and daven like a good boy. What happens to these two children when they grow up? The Rebbe answered, “They each daven exactly like their father!”
There’s no way to guarantee how your child will turn out, but kids tend to follow their parents example. If you openly love your Yiddishkeit and you openly love Hashem and it is obvious to them, it will certainly rub off on them and they will bezras Hashem take after you.