This 12 yo boy takes it serious. I think there's nothing wrong with that. He looks beautiful and healthy, and does the exercises in a way which does not harm his premature body. But's that's my personal opinion as an amateur.

I would’t call him a bodybuilder( thank god!) I like the shape of arms of 10yo boys like this: healthy and strong, round shapes, but certainly not too pumped.

Dry thin muscles

Too much?

Not my favourite stuff, but he sure does have big muscles. I think it’s way over the top for a boy of his age…

The body of the 9 yo boy is very well balanced. He is proud, you can see that(his father too!)

One of my favs: very juicy boymuscles!