a buddie an i used to do this in his garage. we had a 10'x17' track made with 1/2x1/2 rubber square combing taped to the floor. just over a standard deck broom width for lanes. we used to have some great battles on his track. but due to his wife bringing more and more stuff in to the garage we lost the track. we used energizer aaa rechargeable 800mah batteries and we discovered a little trick. one neodymium magnet attached to the motor on one side increased the power and the run time from about 45 min to well over an hour of constant running per charge. enjoy these guys. you can really make these handle well. but depending on surface (we were on bare concrete polished floor) the stock tires arent that good. we experimented with a variety of softer tires. soft tires were much better grip but didnt last long. have fun!