Joel Beeke explains in this video that if a child doesn't want to participate in family worship, a father might have to lovingly but firmly tell that child that they need to attend family worship. We are spiritually nourished through family worship. Accordingly, we must help them to see the importance and value of it.

Psalm 119:105 (NKJV) - "Your word is a lamp to my feet and a light to my path."