Yeah, I hadn't counted on the subtlety (sp?) of using words appropriate to the age of the child. As to Tank, at first, I thought it might be his big brother (because the last name hadn't been given by then and the reference to big feet). Then it became clear THAT wasn't the case. So, I thought it could easily have been fixed by, "If Tank, his best friend, were there...". Although a bit old at either years, even, "...his bestest friend...". But it's clear you put a lot of thought into why you wrote how you wrote. And to have done it so fast! Makes me envious.