um, the info being posted is not entirly true. I am not sure about Florida's exact law, but in Ohio a parent of age can give their underage child alcohol, and a spouce of age can give their underage spouce alcohol.
for ohio...
No one under the age of 21 is allowed to possess or consume any alcohol in any public or private place, unless the underage person is accompanied by a parent, spouse who is not an underage person, or legal guardian. Also anyone under the age of 18 is not allowed to possess or consume any low-alcohol beverage in any public or private place, unless accompanied by a parent, spouse who is not an underage person, or legal guardian. The limit of intoxication to drive a vehicle for someone under 21 years of age is a concentration of at least two-hundredths of one gram but less than ten-hundredths of one gram by weight of alcohol per two hundred ten liters of the person's breath. For everyone 21 years of age or more it's concentration of ten-hundredths of one per cent or more but less than seventeen-hundredths of one per cent by weight of alcohol in the person's blood.
for florida...
a couple of quickie searchs come up with the same thing, no one under 21, no matter what.
A parent can order a drink for a minor in Wisconsin too (don't know about the spouse thing though). This topic seems to come up every so often and the OP (usually a parent) always gets jumped on because people don't realize that it is legal in some states for parents to purchase alcohol for their underage children.