Little Cart using Explorer Hat

I have the Explorer Hat that has been neglected for at least a couple of years so during this quiet time I decided to put it to use. This little cart also uses a Pi Zero, 2 micro motors (1:50 but probably too fast), a couple of Pololu wheels, one of those roller ball for third wheel and a USB powerbank. One day when I have finished other UFOs (UnFinished objects), I will order a camera that will go into the nose. I designed the 3d printed parts using tinkercad.