When I was in 7th and 8th grade, junior high school, there were some tall kids, but nothing like 7 feet tall.
That dude has potential, but he doesn't have a lot of muscle right now. He needs to get with a trainer and beef up. Worrying about stunting his growth from weight lifting isn't really an issue in this case. Did you see the way he stuffed that little boy? He's a giant playing against 5 footers. That ish happens to me at the public courts.
I'm sure he'll get drafted by a Div I NCAA team if they aren't knocking on his doors right now. He's going to UKentucky, Duke, or Syracuse. That's my top three guess. Safety schools (in case they don't draft him hard enough): Indiana, UCLA, Michigan State.