Cars quest was definitely tedious, mainly because it wasn’t that easy to tell if a car was a boy or a girl. How we did it, after dicking around for 10 minutes without a plan, was to list out inventory of all available cars (by color/pattern, gender) then use the clues to eliminate them. Then went back to stare at the cars for things like eye color or license plate number for confirmation. Realized that there are 10 boys listed in clues, and 10 boy cars out in operation. Which meant the two missing cars were girl cars, and can save a bit of energy focusing on the girl clues.