Rewards? For an 11yr old... What about the feeling you get for hitting a great shot. For chasing down that ball you didn't think you could get... For stringing together enough of points to win a game.. win a set... win a match...
That should be the ultimate reward. Something you can't buy with money.
sorry if I am being harsh here.
You are not being harsh. You're just misguided. Telling someone else what you just said is like someone else telling you how great cricket is. Are you going to go out tomorrow and pick it up?