Engineering Challenge

So, going back to my first project I realized that the solar panel manufactured isn´t yet the best source of energy to date. I also noticed that the little car was very instable - speciffically when it ran into Bobby on the first trial run and flipped backward.

I want to create a self propelled machine that can overcome these challenges. Here are the basic parts i have to make my first prototype. What is not featured here is an on/off switch or a ¨POT¨as my cousin suggested. I plan to keep an eye out amongst my things to see if i can salvaje something. Other than that, here are the parts I plan to use.