I'll show you how to build one of your own.
Step 1: Prep and parts list
For the arduino chip I am using a ATtiny85. This chip is smaller than the regular arduino chip which is good because of the room we have to work with. This chip is a little differant to program than the regular arduino chips but it is fairly easy.
Hear is a link that shows you how to program the ATtiny.
Pinewood derby kit
4 bright white LEDs for headlights
2 red LEDs for tail lights
Red and blue LED for flashing lights
ATtiny85 and arduino
any other electronics to complete the circuit. (wire, switch.)
For making the car I used a hack saw and a dremel and it seamed to work just fine.
soldering iron and solder
hot glue gun