No, it is called the Jr. National and it is in June. There is only one (at least in the past). Since your son is a 2020, it would be the National next June. It runs right before or after the Jr. National.
here is a link to the event details and the top few FB results from last June.
https://www.perfectgame.org/Ev...ault.aspx?event=7781
That is not to say the others aren’t worthwhile. You just have to understand which ones are best for you son. My point was just that if they are invited to this one, it is exclusive and one they should attend if possible.