No Points. Simple.
When we used to play spotto as kids, it was a point system. Different car colours had different amount of points. Yellow garnering the highest point of 100 points. The person with the most number of points at the end of the game wins!
A game starts at the beginning of a road trip and ends when you the road trip finishes upon reaching your destination.
… a player must vocalize and shout out “spotto” …
These days with our kids, its much simpler. The person with the most number of yellow vehicles spotted on ANY trip wins. A trip can be any from home to school, home to shops, etc.
To gather a point from spotting a yellow vehicle, a player must vocalize and shout out “spotto” simultaneously pointing to the yellow vehicle identified.