I wouldn't call kid-Garp a normal child:P; but I agree, it seems many characters grew up in a rather filthy and poor environment.
I love how Kizaru just couldn't give a damn back then as well as nowadays~
Well, I said 'relatively.' xD As compared to Luffy, Sabo and Ace, at least. It's kinda funny though–a lot of these characters are just super powerhouses, and they all came from such 'humble' beginnings. Even if Kid!Akainu looks like a serial killer in the making.
Kid!Kizaru is adorable~