"Follow my EXAMPLE as I follow the example of Christ." 1 Corinthians 11:1
We are to live a Godly example before our children. As I mentioned in the post Admit When You're Wrong, it is impossible for us to be perfect, but we can live to the best of our God given ability they way Christ lived. We should be growing every day in His likeness and teaching this to our children. Live so that your kids will "catch" the example, don't just use words.
It is on us, the parents, to disciple our children. We are to be teaching them at all times the ways of the Lord (Deut. 6:5-9). Teaching has the image of sharpening and we are to sharpen the arrows our God has given us with His word and His ways.
We can also help them in directing them to what Godly mentors look like. When they are young we should help our kids seek out mentors who will direct them in God's ways and point them to Scripture for all things.
Lord, grant all parents wisdom to lead by example as they follow Christ.