The first thing we had to do in this project was to make all of the wheels spin. To do this i selected the group for the wheel i wanted to make spin and clicked ctrl+g to group them and made sure that the pivot point was in the center of the wheel. I then created an arrow out of a CV curve and deformed it to be bent. I then clicked the arrow and ctrl clicked the group and clicked on constrain > orient and ticked the x axis. This meant that the wheel would spin on the x axis when i span the arrow.
Rigging 