Jagraj Singh from Basics of Sikhi talks about the importance of teaching Sikhi to their children while their young. He explores that one ultimately makes the decision of keeping rehat or not and the decision should be of the individual, but parents should teach their kids about Sikhi as much as possible.
Historical reference to this topic:
“The Sikh parent who does not teach their children to read and understand Gurbani will be punished.” Rehatnama Bhai Chaupaa Singh Jee
“He is saved, along with his family; bestowing the Name of the Lord, Har, Har, He saves the whole world. Servant Nanak is a sacrifice to one who himself chants the Naam, and inspires others to chant it as well. ||2||” Rehatnama Bhai Chaupaa Singh Jee