The entire Bible, both the Old Testament and the New, is a book
about the person, work and glory of the Lord Jesus Christ. All the
promises and blessings of God given to sinful men and women are in
Christ. All the love, mercy and grace of God are found in Christ. All the
revelation and knowledge of the triune God are in Christ. Christ is not only
the central message of Holy Scripture, he is the message of Holy Scripture.
To understand that is to have the key that opens the Word of God and reveals its treasures. The free children's sunday school lessons posted on this site focus on this message. May the Lord bless this message to our hearts and glorify Christ in the minds of our children.

Proverbs 22:6

Train up a child in the way he should go: and when he is old, he will not depart from it.