Exciting!
Things to know...
Scoring is typically 'tough' - moreso than regular season. A pommel routine, for example, that might score a 9.0 in regular JO season might score a 6.5 at Future Stars. Probably not that extreme across the board, but I have seen some tough judging. My son has scored 5's and 6's on events that I thought looked 'decent'. lol. So boys who are used to being 'standouts' in their usual group (and are probably in FS for that reason) now see a whole new field of talent, some of whom are real superstars (and a few of those kids train ridiculous hours with multiple privates per week, etc, but that is another thread), and also see lower scoring. Just make sure you are prepared for any expectations there if your son is one that is more 'score conscious' or competitive in that way.
If your area is like ours, scores are not 'flashed' anywhere - you only get the scores at the end on a small card, or maybe not at all (coach might get them later in a spreadsheet or something). But I have heard regions differ a lot, so not sure what you will encounter there. But probably much less pomp and circumstance than you are used to at regular meets. More laid back. It is a 'test' type environment as opposed to a 'meet' - at least that's the way I feel about it. We don't have medals or awards, though they give everyone a completion certificate and do recognize the "Top #" that are officially on the 'FS Team' but that's it. No podium.
Also, they can be LONG. More events, and sometimes there are not enough judges to run all events simultaneously, so it is a LONG day. Perhaps pack extra snacks to your child's needs (and Yours!).
What I love about FS is the camaraderie among the boys throughout. These are generally the more serious-minded kids and they form a real connection with other boys across the area. And whether or not your boy comes out 'on top' score-wise, the experience of being in this elite group of focused and dedicated kids is the real prize!
Just tell your boy to have fun, try his best, listen to his coach, and don't worry too much about the numbers. He has worked hard for this, and he should enjoy the experience of participating and demonstrating the results of his hard work. And you're proud of him of course.
Have fun!