For problems with Arduino itself, NOT your project
Installation & troubleshooting
I bought a smart car for my son's birthday and boy was he excited. At least until he finished putting the car together and could not make it go. Now he has lost interest. Thanks ARDUINO
... Arduino is not easy.
No, I cannot agree with this part. Arduino is easy enough. Just to try UNO & blink sketch to "push your foot in to the door", but also the interest must be.