I've got three, 19, 16, and 13 and I have been brewing now about 6 years so they have all been raised around me brewing. We drink beer in our house and live in a very social neighborhood and the bar is always open to friends. All our friends have kids around the same ages and we all basically model responsible drinking and socializing.
All of the kids at one point or another have helped me brew, some are more interested than others and their interests change as their education increases. For example, my high school and middle kids relates to the science aspect of the process and using hydrometers, etc. My college kid is interested in sampling and understanding styles and tastes but doesn't really care much for beer other than an occasional beer with dad and a cigar. (don't get me wrong, he's had a few too many at school and learned from it as we all have)!
They all understand that the adults around them operate in a responsible manner and just don't drink to get drunk and we don't do stupid things like drive when we get together.
On the other side we know kids that have been kept from these things as they grew up and have turned into those kids that sneak out, steal their folk's booze, get drunk at the park and basically do really stupid things that only cause problems; so expose your kids, teach them right and all should be good!