OUR KITS ARE SO UNIQUE YOU WILL NEED TO DECIDE YOUR LEVEL OF EXPERTISE.
You will need to choose if you want rechargable batteries to run indoors or at night.
You would then need to add a blocking diode, on/off switch and a battery compartment which is all availabe with the EXPERT KIT.
Testing and retooling are big parts to the project. Test different size gears for more speed or more tork for hill climbing.
A true designer looks at different materials to decide if the chassis is stronger yet lighter.
Using "solder" instead of alligator clips saves a lot of weight, friction and drag.