C&C per req:
1. There's potential here; I think a horizontal crop just below the two darks boards bisecting the paddlewheel so that all you have in the frame is the bottom half of the paddlewheel and its reflection.
2. Neat idea, but as mentioned, at least a full stop under-exposed. Watch your composition though; you've got the head of the child in the background 'growing' of your grandson. As well, a larger aperture (smaller f#) would have rendered the background less focused and draw more attention to the main subject.
3. I'm afraid I'm not getting much from this image; there's potential for some repeating patterns here, but as-shot, I'm not seeing what you were.
Just my $00.02 worth - your mileage may vary.
~John