Actually, yes, that's what I'm trying to show: that boy is somewhat shy. I tried to have just illustration without saying anything about mom and clerk, but then when he gets balloon he's transformed to more confident and I just couldn't think of how to get ballon's effect on him and his initial shyness in. Thought of first line being something like, "Benji kept his eyes down ..." But I think "Would you like a balloon ..." more...zippy? Upbeat? Fun?