Challenge, optimize this pic of my son

[Ivan Garcia]

I took this picture of my son at the local shopping centre Burger King.
Having finished his treat, he looked bored as my wifeand I were deciding on the next shop to visit.
I wanted to capture his boredom, so I decided to give the image a dreamy quality. I used a large aperture in order to achieve this. Below is the jpg the camera produced, no cs treatment.
Sorry, no raw file, as the camera was set for jpg, (no room in my card).
You can get the full size jpg Here