A very cute shot, though I could barely see the game control in his hands so I was left wondering at first what he was biting his tongue for.
The lack of a border hurts this shot on this for the particular challenge. Also the really tight crop leaves me wanting on the top around his head. And the title, concentration doesn't quite fit for me, I'm thinking more along the line of FOCUS is the key type thing. I started with a 4 for the reasons stated above but am raising the score to a 6 because the shot itself is well done. Nice capture.
The only thing I don't like about this is that he's concentrating on a video game, instead of a book, but I'll just assume is an educational game, or think of the hand-eye quardination he's developing ;)
Cutie face. A bit oversaturated on the bottom left. But the face loks ok. I am not sure if I would consider this motivational poster, but for a shot of a kid is kind of nice.