Rokuhan Track to make an oval approximately, 626MM (24.75") x 406MM (16") a Rokuhan RC02 Controller with wall power adapter (so you don't have to use AA batteries!) and feeder cable. Don't make the mistake of using just any old controller with an oval of track, the Rokuhan RC02 is designed for Z scale operation.
Rokuhan Z Scale Layout H With RC03 Controller & Wall Adapter
Rokuhan Z Scale Double Oval Layout I With RC03 Controller & Wall Adapter