Routine for a young boy 15

[Jack O'Neill]

I used to manage my workout routine and my diet since several years now and I begin to be fine with it.

My son would like to start training. New passion in watching me training

He is 15 175cm. Will be like me in 2 years to my mind : about 185-190cm, 6'15

Can he start training now though he doesn't reach its adult height ?

If yes what kind of workout routine would advice me and what kind of diet?

Thanks for your help.

Edit. In a natural way of course