Jesus Stays Behind

When he is about twelve, Jesus travels with his relatives to Jerusalem for the Passover celebration. After the feast, the family begins the journey back to Nazareth.  After a day's travel, Mary and Joseph realize that Jesus is not with the other children! They turn back to look for him. After three days, they find him in the temple, studying with the teachers there. What was Jesus thinking? Didn't he know that his parents would be looking all over for him?