Great advice from the  responses here.  I would also stronlgy suggest that once the game or practice is over, when you get in the  car with him, don't get right to the criticisms, or even the game or practice. Ask him how he is doing, what he thought of the game, etc. and let him tell you what he wants to and when he wants to. If anything, heap lalot of praise on him to keep him motivated as opposed to crticism. Do remember that he is only a young boy and your patience with him in this sport wil go a long way. Good luck to you and him. it is a great game that will provide him with more than just getting in good shape. he will learn team work, trust , dedication, camraderie and most of all, he will have fun as long as he is under no pressure to perform.

The most important advice would be let the coaches coach. Don't get upset if a coach takes him out of the game because usually there is a reason. The Pop Warner League is very organized. And after spending several hours of practice, we all become family. We've been in going on 3 years and it's the best choice we've ever done. Give it a try, your son will learn a lot. Thanks!