First Year Newborn 1 Month Old 2 Month Old 4 Month Old 6 Month Old 9 Month Old 12 Month Old Second Year 15 Month Old 18 Month Old 2 Year Old Ages 2 – 10 2.5 Year Old 3 Year Old 4 Year Old 5-6 Year Old 7 Year Old 8 Year Old 9 Year Old 10 Year Old Teenage Years 11-14 Year Old 15-17 Year Old Young Adults 18-21 Year Old
