As with most mums, the Princess of Wales no doubt faces her fair share of challenges when it comes to raising her children. But with Prince George about to enter his teenage years, and start a new school in September, both she and Prince William are bracing themselves for a particularly testing year. The couple are known to fiercely protect George, 12, and his younger siblings Princess Charlotte , 10, and Prince Louis , seven, so they can enjoy their childhood with as much privacy as possible.