KINGSTON — If the shape of these particular bowls looks, um, puzzling, it’s because they literally are. As about 500 Wyoming Seminary Upper School students and faculty fanned out around the region Friday for an All-School Day of Community Service, 27 of the youngsters stepped into the ceramic art studio in Nesbitt Hall to make Empty Bowls. It’s not just a descriptive name of their creations, it’s an international project to fight hunger, intended to operate at the grassroots level.