Use this kit as a stand-alone or combine it with other accessories making a more complex machine with more capabilities. The gear box can be built with two possible gear ratios, standard: 203.7:1 or High Speed: 58.2:1. The Tracked chassis includes the pre-drilled wooden base, the Tamiya Tracked kit (multiple lengths of rubber track which can be connected together, as well as plastic drive and idler sprockets), several plastic compenents which connect to the wood base to support the shafts, and a single gear motor + gearbox (unassembled).
This is the product If you are looking for a simple and easy to manage.
* Requires 2 X "AA" Batteries (sold separately)