For this project, we had to build a car that runs on an alternative form of energy. We tried and tested many designs to no avail. whether it was a monorail or a weighted pulley car, none of those worked. In the end, we ended up with a very simple design. Two wheels and a box.
For about two weeks, we tried to create many different cars, but in the last day, we created our final design, a car made with two wheels and a box that rolled down a ramp.