My boys and I mixed up some Mr. Root Beer this weekend. My dad sent us a Mr. Root Beer kit awhile back. We tried to make our first batch back then, but somehow one of the kids (Connor would be my guess) misplaced the actual Root Beer Flavoring bottle. We did not discover this until it was time to add it, and we ended up trying to make it without the root beer flavor. It turned out pretty bad. Basically, root beer without the extract is white sugar and brown sugar water. As it turns out, the extract is the worst part to lose, because the kit came with 2 of everything EXCEPT the extract bottle (one bottle of extract is good for 2 batches).
Since then, I ordered a refill, and we finally got around to "brewing" another root beer batch, this time with the actual Root Beer Flavoring. Carbonation involves a little wine yeast for a couple of days (which means our root beer will have a little alcohol in it, but not much I think). Today, we felt the plastic bottles and decided that they were hard enough to indicate a good amount of carbonation, so we put them in the fridge.
We will probably chill them until this weekend and see how home-made Root Beer (with actual Root Beer Flavoring) tastes.
I'll keep you informed.