By Kelli Kyle On a Sunday afternoon, Finnegan O’Brien fires up the grill at Grubbi Groks BBQ, a barbecue restaurant in Dryden. At just nine years old, he is just over a foot taller than the appliance he is using. “It’s really fun,” Finnegan said. “They let us do stuff we don’t get to do at home – like using the grill, using the fryer.” At the other counter, his seven-year-old sister, Hazel, cleans leaves of oregano. Their father, Sean, stands watch at the center island, where