At his age, the Coaching Staff sets the tone for the team.
If they promote team spirit and team support, the kids will respond to this.
They also will do well to remind these kids, this is for fun, it is to learn how to play and learn how to improve yourself.
My Nephew has played every sport possible since he was 4. He will once again be the Quarterback for his high school football team. He is awesome with his teammates.
The thing I have always been impressed by, was that most of his Coaches have ALWAYS put emphasis of doing your best and cheering on your teammates to do their best. Not to put them down, but to encourage them, even when things did not go well.
Everyone is learning and training at all times.
They are to be treated as your brothers.
The kids are usually way harder on themselves than each other. I love seeing and hearing them say, to each other "Good job", "better luck next time".. "Or walk it off, it is ok.."
This is the age, this really needs to be encouraged. Coming together as a cohesive team is the secret to the best teams.. No stand outs..