Erion, Nikita, and I made a rubber band car. We made it differently from the directions told us to, because we wanted it to behave differently. We also had some ideas about how we might make it better. You can read the basic instructions on the PBS Kids website.
Deviating from the directions worked for us! We beat Jake and Zeke's rubber band powered car in a race. The car was fast and could last, or run, a long. We used putty, duct tape, skewers, faucet washers, CDs, and a rubber band to make the vehicle. The cardboard was 5 by 6 inches long. The rubber band car had a extra pair of wheels and customized wheels.
The following video clip shows a giant rubber band car made for humans to ride. It is from the Makers' Faire in Austin. The two DESIGN SQUAD engineers are not Adam or Judy. Rather, they are hosts from an earlier season of the show.