When I was in 5th grade we went on a field trip with my class to a local farm. I only remember a few things about that trip but two things have stuck in my memory. First, one of the boys in the class tried squirting milk on a group of us while milking a cow, and second, the farmer pointed out some rhubarb growing. I had never heard of rhubarb, had no idea what it tasted like, and really didn't think about it again until it showed up in the first ...