Well, theoretically, you have to be 18 to purchase the ticket. However, I remember purchasing many tickets while I was underage for my mom. Of course, if she ever won, she would just say that she purchased it. The main thing is who the prize is awarded to (that person, of course, needs to be >18).
I know in Georgia you have to be 18 to purchase tickets. How do I know? I normally get carded when I buy tickets(which I rarely do…but sometimes I just need to pay the “stupid tax”).