The second reading in Genesis, Matthew, Psalms, and Proverbs.
Genesis 3:1-4:26, Matthew 2:13-3:6, Psalm 2:1-12, Proverbs 1:7-9.
The fall, the child's escape from Herod, God mocking at the petty attempts of those who plot against him, and appropriately, advice to children.
It's a good place to start. How we screwed it up and the first hints of God's cunning plan to fix everything. And little child, listen to his lessons there.
To read along:
"Then he said, "I tell you the truth, unless you turn from your sins and become like little children, you will never get into the Kingdom of Heaven." Matthew 18:3