With the arrival of Memorial Day weekend one of Boston's most successful tourist attractions is ready to make a big splash to start the busy season. "June, July and August are our peak months," Boston Duck Tours Cindy Brown said. "It's all-out for us for the next three months." Brown started off working at Boston Duck Tours when it was a 15-employee business that carried 600 passengers in four duck boats in its first year of operation in 1994.