Well ... seeing as they are so small I can't give any specific critique other than composition really.

The 1st 2 shots are very nice in composition, nice moments captured well it would appear.

The 3rd shot looks like a std snap from someone standing upright, which is fine quite often but in this case I wouldn't have taken it like this. Being restricted to the boardwalk limits the photographer somewhat but crouching down and holding the camera off to one side a little would have created a much more interesting leading line out of the boardwalk and you could have included more sky as well. I feel that's a bit too tightly cropped out in this.