THOMAS & FRIENDS™ - PERCY and the TROUBLESOME TRUCKS Ready To Run Electric Train Set - N Scale. The Troublesome Trucks are needed for a hauling job, and Percy is there to make sure the work gets done without the trucks causing too much mischief! This ready-to-run electric train set comes complete with Percy the Small Engine, Troublesome Truck #1, Troublesome Truck #2, and a 24" circle of nickel silver E-Z Track®.