PBS Kids Design Squad. They did the race by using a straw, CD, and three balloons. And it worked — the balloons went super fast it zoomed threw the race way.
Before they used three balloons they used two balloons, and it wasn't going as fast as the one with three balloons. Before that, they used CDs and plates. When they used plates. it didn't go as fast when they used CDs. The balloons run on helium and it makes it go super fast. The kids who did this was Shane, Aric, and Alexis.