Jesus was born as a real, live, breathing, flesh-and-blood baby. Mary had to change His diaper. He learned to push up, then roll over, sit up, stand, then walk just like any other baby.
He went to school in the synagogue, and learned to read and write from the scribes. He faithfully attended synagogue and worshiped Jehovah God of the Israelites, the One Who was His Father. He went up with his parents to Jerusalem to sacrifice and worship when He was 12, as was the custom of that day, and discussed the Torah with the doctors of religion where He shocked them by His grasp of Biblical concepts and memory of scriptures.
Jesus was different from anyone who had been born before. He did not have the original sin of Adam residing in his body, since He was born of a virgin mother by the power of the Holy Spirit of God, with no earthly father to transfer the original sin to Him.
All other people are born with the original sin of Adam in our bodies, passed down from our fathers. At a certain point in our life, called by some the age of accountability, we recognize the difference between right and wrong, and inevitably we sin and fall just as Adam and Eve did.
Jesus laid aside all His glory in Heaven and was born on earth as a man.
Philippians 2:5 NIV, “Your attitude should be the same as that of Christ Jesus: Who, being in very nature God, did not consider equality with God something to be grasped, but made Himself nothing, taking the very nature of a servant, being made in human likeness and being found in appearance as a man He humbled Himself and became obedient to death, even death on a cross.”
God became man, Jesus Christ, so that all men by His death and resurrection could be reconciled to God.
This is the real Christmas story, the greatest story ever told.