WHEN it came time for Victorians to nominate the 101 'must do' attractions of the state, Warrnambool's humble burger joint Kermond's made it into the top 50, ahead of the Otway Fly and Healesville Sanctuary.Yesterday, that ever-popular hamburger haven turned 60 years old, celebrating six decades since the first patties were flipped in a caravan at the foreshore by Joseph Kermond in 1949.When summer was over, the caravan moved to Lava Street, was eventually replaced with a shop, and little has changed since.Joseph's son Robert Kermond, who's been flipping burgers for 43 years, said it was business as usual yesterday, despite the milestone.When asked about the secret to Kermond's success, Mr Kermond just shrugs and laughs."I don't know," he said. "I guess that's why there are so many books about how to succeed in business (because no one knows exactly)."But part of the key must be a few unchanging factors - the recipe, the location, the taste and being a family-oriented business."There's been a lot of families come through," he said. There's the Healey family (Brett is a part-owner with Mr Kermond), plus Mr Kermond's four daughters have all worked behind the counter. "Jack Daffy had about six children work here or maybe seven. You get a lot of brothers and sisters working here. "My brother Bill had eight children and my brother John had six children and they all worked here."Somehow, Kermond's has became engrained in Warrnambool's psyche, taking it above and beyond being just a burger joint. "You get parents come in and bring their children, and then the parents pass away or move away and the kids still come in and they bring their kids."One of the reasons we're so busy over Christmas is there's a lot of Warrnambool people coming back home."Some people have been coming here longer than I've been working here. "One guy the other day said 'I used to come in here before I could see over the counter'. I said 'well, I probably served you'. He said 'I wouldn't know ? I couldn't see'."