Larger penis and testicles that start to make sperm.PhysicalĪt this age, 15-year-old boys continue to grow. While it differs a lot from boy to boy, there are common milestones to look for. It’s a time of physical changes, but it’s also a time of big intellectual, social, and emotional development.
They are probably in their first or second year of high school.Ī 15-year-old is an adolescent - no longer a child, but not yet an adult either. It may be hard to believe, but your son is 15. That little boy with the skinned knees and funny grin isn’t little anymore.