Naw, you're good.
Each child is different, and is each parent. I can't comment on your boy, as, I don't know him.
But you do.
The real question is do you feel he is ready? From the photo's you posted, he has the physical strength to use it, its the mental part that's hard to judge.
I gave my daughter her first one at age 7, as well as my youngest at age 7. I had my first one long before that age.
I think you are good to go, and I would also recommend not dulling or rounding the point. I make sure my daughters knives are sharp, and ready.
But that's just me.
Rum, Sodomy, and the Lash.