There was more to the robot than the cardboard and motors mentioned before in the blog. The wheels attached to the motors are from a lego kit, they are attached with hot glue. The cardboard body of the robot is held together with zip ties (we would have used nuts and bolts to hold it but we were attempting to keep the robot as light weight as possible) and everything else comes straight out of the arduino kit we we purchased at the begining of the semester.