BW resistance, but wouldnt touch heavy weight, always heard it stunted growth, maybe I am wrong though, who knows somebody prove it
I remember reading an article some doctor wrote on this topic. He said body weight only until 13, then start with light weights and progress from there. He gave a bunch of medical reasons for his logic but I dont remember any of it...

BW resistance, but wouldnt touch heavy weight, always heard it stunted growth, maybe I am wrong though, who knows somebody prove it
Exactly this! Calisthenics and bodyweight until 13-4 or so. Make sure they're running around too, have some endurance and are involved in sports. Once the testosterone starts going at around 15 or so, freshman year of high school, it's time to start serious training.
But as always, make sure their grades come first! Anything lower than a C in school = no lifting. Best thing any parent can do. I found that sometimes I prioritized my workouts over schoolwork (and you definitely do at that age), but I had enough of a cushion to still graduate top 10%.
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