TeenyTrack Nano Kit is Worldwide smallest moving train set that recommended for dedicated enthusiasts, who are striving to build stuff by themselves. Fits the Dole Houses. The kit includes: 1. Fully integrated Unit, does not require any assembly. 2. Set of Silver Nano Express Train (one locomotive and three passenger cars)  3. Power adapter for 110 V - 250 V. Proudly Made in the USA. "The smallest moving Track with the train on it," Ed Lopatinsky, President of IDL Motors, told TDmonthly. Launch date: June 2012.