PERTH AMBOY – Raritan Bay Medical Center is sponsoring this interactive class designed for babysitters, ages 10-16, and focusing on first aid, household safety and the fundamentals of child care, including hands-on manikin training. Cost is $15 and includes a take-home safety manual. Friday, March 23 from 4 p.m. to 7 p.m. at the Raritan Bay Area YMCA, 357 New Brunswick Avenue, Perth Amboy.