0 (note: This is when you first become a baby) 1 (note: This is when you first become a Toddler) 2 3 4 (note: This is when you first become a kid.) 5 6 7 8 9 10 11 12 13 (note: This is when you first become a teenager. This is also "The Jewish B'nai Mitzvah") 14 15 (note: This is "The Quinceañera". This is the start of young womanhood for girls) 16 (note: This is your Sweet 16. You usually get a drivers licence at this age.) 17 18 (note: This is when you first become an adult.) 19 20 21 (note: The official end to underage restrictions) 22 23 24 25 (note: Your brain's prefrontal cortex is finally fully developed. A quarter of Earth) 26 27 28 29 30 (note: You generally have a better sense of who you are and the supreme confidence to say "no" to social plans you dont want to attend) 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 (note: Half a century on earth) 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 (note: This is when you first become elderly.) 66 67 (note: Dont say it...) 68 69 70 71 72 73 74 75 (note: 3 quarters of Earth) 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 (note: A full Century on earth)