One night Mary was at home and an angel appeared saying to her "Don't be afraid, Mary, for ypu have found favour with God. And now you will conceive in your womb and bear a son, and you will name him Jesus. He will be great and will be called the Son of Most High." Mary replied with "How can this be, since I am a virgin?" The angel said "The Holy Spirit will come upon you."
Joesph road by a donkey to get to Nazarath in Galilee to Judea, to the city of David called Bethlehem, because Joseph was desended from the house and family of David. He went to be registered with Mary, to whom he was engaged and who was expexting a child.
While Mary and Jesus were in Bethlehem, the time came for Mary to deliver their child. The problem was that there was no room in the inn to deliver their child.
Mary and Joseph both went to the towns houses and knocked on everyones doors to see if there was any spare bedroom that Mary could give birth in, but everyone was full and had no room. So they both road along the streets in Bethlehem until they could find a place.
Mary and Joseph found a stable that had room for Mary so she gave birth to her firstborn son and she wrapped him in bands of cloth, and laid him in a manger.
Mary and Joseph were very glad that they gave birth to such a special child and soon to be the Son of God.