I hope your kid is having a blast. I think Stratford was up in Dallas with us for the Texas Cup. We didn't end up playing each other.
In my time playing and coaching, I don't think I've ever had someone try it, and not love it. Just a great and challenging sport.
My sarcasm meter may be off, but here is a little guide. One of our stud basketball players came to watch last week, and when he saw me at school he said, "it was fun to watch, but you need to teach me about it"
1. One whistle - Ordinary foul like knocking the players arm or pusing them down when they have the ball. Offense keeps the ball and has a free pass. The need to pass it quickly, or make it live by "popping the ball" (tossing it up or dropping it)
2. Two whistles- Turnover, Offensive Foul (like basketball charging) , or Ball Under. The ball ball is going the other way
3. Multiple whistles - Ejection. Grabbing our pulling someone back. Impeeding someone (like a basketball blocking foul) Someone needs to go out for 20 seconds, and offense is man up.
Enjoy it. My boys, 11 and 9, started playing 2 summers ago. If they keep it up, they will be so much better then I ever was since they are starting so early.