My son (6 years old) has EZ track running around the ceiling in his bedroom. It started out with the Chattanooga kit, then added another loco and a few cars. For Christmas he got some ore cars, and some flatbeds and a new Loco. Now the train cuts out when he turns it on. After being turned off a while it starts to work again. I was kind of expecting it, thinking that 3 locos would be too much for the power supply that came with the Chattanooga kit. Does this sound right? Can I get a better power supply? I should add that we are relative newbies to model railroading.