In Little League, the "dropped third strike" rule allows the batter to attempt to reach first base if the catcher fails to catch the third strike. Here are the key points:

1. Uncaught Third Strike: If the catcher does not catch the third strike, the batter can run to first base.
2. First Base Unoccupied: This rule applies only if first base is unoccupied at the time of the pitch, or if there are two outs[1].
3. Catcher's Responsibility: The catcher must either tag the batter or throw the ball to first base to record the out[1].

This rule adds an exciting element to the game, giving the batter a chance to reach base even after striking out.