There are different levels of junior organized sports and in my opinion the very first level should not keep score. This is the level where you help the youth discover an interest in the sport, where s/he learns the rules of play, how to be part of a team, how to listen to a coach and behave outside of the home.
I use to coach youth baseball and started with T-ball and I can tell you at that very first level the kids didn't care about the score.... They did ask all the time, "are we winning" or "did we win?" I would tell them that they won the moment they became part of the team.
At the next level, they learn about competition, and sportsmanship and that is when it is appropriate to learn and accept a more deeper connection to the sport and that mush include keeping score.
At the first level, score is more important to the parents than it will ever be for the kids, because after the game, all the kids want is their treat.