arrives when they become 18 years old. Kids become adults at the age of 18. Many responsibilities and privileges are given to people of this age, such as the ability to enroll into the military, to vote, receive their driver's license, and to buy cigarettes. In the United States military system, you may enlist into any branch at the age of 18 years old without parental consent. The Twenty-Sixth Amendment states “ the right of citizens of the United States who are eighteen years of age or older, to vote