This is a great portrait - stunning in fact and the B&W works. I wonder if it is a stop too exposed. He has such good smooth skin tones and I think we're just missing some of them
This is a cute picture, but it seems out of focus and overexposed. I'd like to see more texture, light and shadow variance on the boy's face. Tack sharp focus is essential for an effective portrait (and any photo for that matter). Maybe work on lighting so it's not so harsh. Or do it outside with early morning or late evening light. The crop is good and the crab adds a nice "boy" touch to it.