The Catechism in Questions & Answers

128. What is known about Jesus’ childhood?

Luke 2: 52 states that Jesus increased in wisdom and stature, and in favour with God and men. In Luke 2: 41-49 we read that the twelve-year-old Jesus had conversations with the teachers in Jerusalem, who were “astonished at His understanding and answers”.

“And Jesus increased in wisdom and stature, and in favour with God and men.”
Luke 2: 52