Physical development milestones from birth until 10 years By Jeffrey'stimeline May 12, 2017 First month May 12, 2017 4th month May 12, 2017 One year May 12, 2017 2 years old May 12, 2017 3 years old May 12, 2017 4 years old May 12, 2017 5 years old May 12, 2017 6 years old May 12, 2017 7 years old May 12, 2017 8 years old May 12, 2017 9 years old May 12, 2017 9 years old May 12, 2017 10 years old