When we moved to St.Catharines back in the mid 60s there was a Soap Box
Derby Hill. It was actually a city street with a couple houses on it in
a quiet little corner of the city. In the mid 70s they built a highway
though the city and the grade was removed, so no more steep hill for
soap box races and no more derby.
When my son was in cubs they had a competition project with little
gravity race car kits. The kids paid to buy a kit and then had to
assemble and decorate them. I was ticked off about the first place
winner. The son of a wood carver won, and it was obviously the father's
work, along with a paint job that I doubt a kid that young could do on
his own.