A cow

Catch the cows

 A cow

This one is best played when travelling through the countryside.
Simply catch as many cows as you can. First one to 500 wins.

Watch out of the window for a field of cows. The first person to spot a field of cows and call out the number of cows gets to keep them (guess the number if you can't count them all) - keep a track of each persons herd.

If someone spots a cemetery they can announce a 'cow loss' and choose a person to eliminate their herd.
If someone spots a police car they can announce 'cows in jail' and remove 10 cows from another player.
Finally, if someone spots a church they can announce 'cow marriage' and double the number of cows in their own herd.

Depending on your journey you may want to do some alternative spotting - sheep, horses, etc.