Slot Car Racing: HAS of Trio Raceway in Oakville, Ontario, the largest slot racetrack in Canada. LSs, MLSs of cars racing on track, of spectators watching. Various shots of slot car racetrack in private home, tiny cars speeding madly, adults and children watching. Front shot of man and boy working on midget race car. HAS over shoulder, of man operating tiny model-maker's lathe. CSs of father and son working on car.