1. Learning mushroom takes a long time and can be frustrating, but if he sticks with it, someday you'll look over and see him doing a billion circles consecutively. Yes. You will.
2. Most boys' meets begin with what is in effect a 1.5 hour practice. Go to the bathroom while this is happening, because once they start competing, it's event event event event event event and then they're done.
3. Sometimes it seems like the awards take longer than the meet. You know to expect this if the ceremonies start with the fifteenth place 6 year old vault winner.
4. Men's coaches at all times have to strike a balance between keeping a fun atmosphere that keeps the boys engaged and maintaining discipline so they don't go nuts. Smart ones will do this in ways that encourage the boys to compete with each other constructively (i.e., who can hold the handstand the longest), because if not, it will happen non-constructively (i.e., who can make the best fart noises with his armpits while standing in line waiting to vault).
5. With this sport, the stakes are a lot higher for paying attention and not fooling around when the coach explains things or introduces a drill. The beginning soccer player won't kick a ball very hard if he does a drill wrong. The beginning gymnast could get badly hurt. What may look at first like overly strict discipline may in fact be directed at keeping your child safe, especially with tumbling and swinging skills. (Shorter version: unintentional headsprings are not fun to watch.)
6. Boys can be just as sensitive, if not more sensitive, than girls about learning skills and doing the hard things this sport demands. It's a strange sport in that as soon as they finally master something, they almost immediately move on to some new thing they'll have to fail at about 1000 times. Get your "if you keep working on it and don't give up, you will get it eventually" speech ready now. And congratulations: you've just been promoted to sports psychologist.
7. So much of what they learn will be relevant in their lives long after they've done their last back handspring or swing to handstand. Done right, gymnastics is a great foundation for teaching persistence, sportsmanship, patience, courage, and empathy. Enjoy the ride!