Maybe the better strategy it ti teach them that the whole point to get just slightly tipsy and keep their dignity. Of all the drinking people I meet in my cab driving job, the only ones that don't seem sick and unhappy are the ones who drink just barely enough to have an effect.
Is there a brew shop in your city? I'd spend a little more on a 5 gallon carboy. If you try with the 1 gallon batch and you like it you will run out right away, and you will want your next batch to be big enough to last so you'll end up buying a bigger carboy anyway. If you try it and don't like it you can easily sell the used carboy on craigslist. Plus it will be hard to buy ingredients in a small size for a 1 gallon batch.
So city planners can practice word economy. I live in a city with a Park Street, a Park Avenue, a Park Lane, a Park Drive, a Park Lane, a Park Way, a Park Terrace, and a Park Boulevard.