There is an article on JW org about puberty, which would generally be considered to be anywhere from the ages of 10 to 16 (but from the years of 8 according to the WTBTS. These are some of the points they acknowledge -
The hormonal surge that causes the physical changes of puberty can take a toll on your emotions. You might even experience powerful mood swings.....
While going through puberty, many young people also feel extremely self-conscious, as if they were being watched and judged by everyone....
What you can do -
Try to adopt a positive view. Really, puberty is a physical and emotional makeover that you need.....
The bottom line: Puberty presents its challenges. It also affords you a wonderful opportunity to grow—not just physically but also mentally, emotionally, and spiritually.—1 Samuel 2:26.
Even through this tumultuous time the GB consider it appropriate for children to make a public declaration.