Bossk (and anyone else that doesnt know) the Cub Car Rallies are races of little wooden cars that the scouts make. they have a kit you buy thats a block of wood shaped basically like a car that you can carve and paint how you want it.
then the cars are lined up, in a track (think ours had 4 or 5 lanes) that is basically just a straight path with a drop at the begging to give the cars momentum. cars are all released at the same time and first one to the end wins. there was a bracket type thing and an ultimate 1st, 2nd, and 3rd place winner.
obviously depending on the pack would determine how big/crazy of an event it was, some people end up getting all serious in designing the fastest/coolest car and others just do it for fun (though most anything is like that). but it generally tended to be either the whole event was a big thing for the pack as a whole or just a fun event.
ive taken 2nd and/or 3rd before...cant remember if my car ever got first
there is also the rain gutter regata (not as big) that was same type of thing but with boats (couldnt really modify the boats as much though) and basically you would float them in rain gutters and the boats owner would blow on the sail to power the boat and get it to the other side.
-Darth Simon