i have my son doing some very basic towel drills prior and very light theraband work to get him introduced to using it and becoming more familiar with it as he gets older (he's 6). i will likely put him through a throwing program over time as get gets older (junior high) but be smart about use and what exactly i'm having him do. i don't know what Kip is doing with his kids, but sounds like he has a pretty good game plan in place. when he gets older (HS), i'll start some concepts of driveline but really not until he's older will it do us much good. just remember the whole body is involved in throwing/pitching so incorporate drills and routines that focus on that.
like you guys mentioned, getting reps - consistent, quality reps - is just as important as game play at the younger age, reason why I won't do select ball until he's around 12.. I wish we could be out there playing but i know when i'm with him i have him putting in quality work that i can oversee without having to divide my attention across 10 other little kids an ultimately will serve him better. selfishly i wish we were playing because my son's team is pretty good and likely would've won our league but i'm mostly saddened that i am losing a chance to be his coach. i only have so many times before i am no longer his coach and cherish every chance I get to be his coach. just sucks