Radio Shack sells little remote control battery powered cars, called ZipZaps.  Ever since I first saw them, I thought there had to be a use for them.  I picked one up on sale for $12.

They come with a little charger to power the car.  The charger takes 4 AA batteries and takes about a minute to charge the car.  Yep, that's right, you also don't get a LOT of time for this to run!   But, the charger also functions as your RC.   It does forward, reverse and steering.

All of a sudden, I was inspired.   I thought this could work!
It's a bit faster than I really wanted, but where else can you get battery and RC for $12????  :) It only runs for a couple of minutes, but it looks sweet going down the track.  ;)