We had a silverlit transformer and a Chinese one for my son. There is a difference. Native fasteners are better, and plastic is of a different quality. Bought last year, relatives are still whole. The transformer is very simple. A 3-year-old child can do fine. The cars are distinguished by the fact that there are just iron ones, they are di cast, inertial (they are slightly larger and made of plastic) and smart, which need to be charged and they drive along the track themselves. The child likes everything.