One player stands at home plate. He tosses the ball up and hits it, usually as far as he can. He places the bat across the front of home plate. The first fielder to reach the ball stops where he got it and throws/rolls the ball towards home plate in an attempt to hit the bat. If he hits it, he is the new batter. Otherwise, the current batter remains.
Variations include: a ball caught in the air is an automatic exchange of batters; if the ball pops up after hitting the bat and is caught by the batter, he is still the batter.
-Might as well, we don't have enough for a real American ball game