"Listen, my son, accept what I say, and the years of your life will be many. I guide you in the way of wisdom and lead you along straight paths."
Three times in this chapter it makes it clear that this is a father talking to his son. Verse 3 says the son is, "still tender and an only child of my mother," this child is young. I'll guess this child is 2-3 years old since he is the only child and much older than that there would most likely be more children. Note the parents are teaching, guiding and preparing this child to walk along a straight path. The verses above (Prov.4:10-11) show the parents are confident in their guidance--they KNOW they can instill wisdom and protection.
Do you KNOW you can instill wisdom and protection in your children? You can and you must! God expects us to be speaking to our children and we are to be charging them to listen and to accept what we are saying. Character training involves a lot of speaking into our children's lives. Repetition is a key to instilling guidance. Read Proverbs and note the repetition. Remind yourself, it is not about how many times a lesson has to be taught--it is about training until the child gets it.