What is a soap truck? What is a soap truck?

The soap truck has no power and simple structure. Originally made of discarded wooden soap boxes and roller skates, it was also made of metal and fiberglass. The rudiment of this competition is children's games. They put wooden boxes filled with soap on wheels, converted them into a simple racing car, and then gradually developed into a "soap racing car." Complementing the strange clothes of the players, these cars also reflect some whimsy of their owners. The soap car contest is very interesting, and the novel prizes in the contest are also very interesting. The track is set on the slope of a street in the city center, and the contestants drive all kinds of strange cars all the way down from the starting point.