In a cool way and close to adolescent behavior, the second phase of brain evolution, which goes from 13 years old to 20 years old, is discussed. The problems that end up distressing and worrying many parents are addressed, such as anxiety, low self-esteem, bullying, the use of legal and illegal drugs and insecurity in the face of responsibilities and some challenges of age, such as abuse and violence, driving, voting and, mainly, choosing a profession.