This is a tough one. Usually there is no scoring because they their goal is to teach the kids good sportsmanship. You know the saying, "it is not whether you win or lose, it is how you play the game." This is basically what they are trying to teach them.
However, you can be assured that the coaches are keeping score. They do this so they can give the team pep talks after the games. It helps the kids moral if they know they have won. Keeping score can also be used as a way to help kids see what they are doing right and what they are doing wrong. If they are losing all the time then they obviously need to practice more.
Some teams can be pretty bad when they start playing so not keeping score saves them the embarrassment of losing all the time.