It's seven inches long and goes nine feet. It's due today and is 35% of PlusOne's Science grade. The hardest part was getting the wheels to rotate. Mom and PlusOne tried washers and cd's on dowels, but they kept wobbling. You could NOT use a wheel that was specifically designed to be a wheel. You could have two nine inch balloons to power it, but it didn't go any father with two than with one.
PlusOne will be judged on design, how fast it travels and how far it travels. Let me tell you, it was not as easy as it looks. When mom and PlusOne tried this body and it moved three feet (after several failures) mom let out a whoop that had me running for the hills. Here's hoping for a good grade.