This is so beautiful. Odds are, he sees his parents worship like this at home!! The most powerful way you can introduce your children to God is to invite His felt presence into your home through times of worship and study of the Word and prayer. When we bring our children into these times at home, they will be sensitive to His Spirit in ways other children, who only get one hour of Sunday school once a week, are not.
“Train up a child in the way he should go, and when he is old he will not depart from it."-Proverbs 22:6