You must be 14 yrs old, in the state of Indiana, to obtain a work permit (with restrictions)
You must be 16 yrs old, in the state of Indiana, to obtain a driver's license.
You must be 18 yrs old, to obtain a voter's registration.
You must be 18 yrs old, to buy cigarettes.
You must be 18 yrs old, to enter the military and fight for our country.
You must be 18 yrs old, to obtain a gun permit.
Unless you request emancipation, you must be 18 yrs old, to be considered an adult.
Marriage, varies from state to state, but I think for the most part, you have to be 18 yrs old to obtain a marriage license.
You must be 21 yrs old, to buy alcohol.
As long as you are physically able to procreate, you can have children (no instructions or training required!) You can even have children if you are a criminal, a molester, or unstable!
As long as you meet the age requirements, you can vote, no matter if you are an imbecile, racist, or terrorist!
You can pretty much buy a gun, after a little back ground search, and I do mean LITTLE, if you intend on using it on others.
Even though we consider you an adult, old enough to make decision like marriage, voting, buying a gun and cigarettes, as well as fighting for our country, we don't think you are old enough to drink alcohol.
I could go on.
I just got a little pissy thinking about this last night. It makes no sense to me.
Do you wonder where we messed up on some of this? What the heck?