Cece's class went on a trip to a sweet potato farm to learn more about where food comes from. Personally, I think a third grader should already know that food grows on farms and doesn't just appear at the grocery store. Okinawan sweet potatoes are not anything like yams, they are not sweet - just very fibrous. She picked so many and then had to carry them back to the bus.
After the sweet potato farm we went to Bios on the Hill for lunch. It's a huge garden of wild growing orchids with a boat ride and a small animal petting zoo.