Way to go AAP.. Good to see that you are steering them in the right direction vs seeing them spending 1hr on the flat bench, which i see all the time with high school/freshmen that come in when school is out...
Bet the 8 chest sets are the hardest they ever endured. Know they will be sore for 3 days instead of just 2 days. Thats cool that you are taking only $100 and using the rest giving back to them for supplementation/nutrition.
From your story and these guys being as young as they are and putting up the weights they are, in 4 yrs they will be easily over 200 lbs, throwing heavy weights, and looking pretty good.
Shit i was only 110lbs at 17 yr old.. Now 190 lbs at 30 yrs old.. Gotta start somewhere