The framing on the second picture kinda bugs me. If it were me taking the photo, I would've either but the boat in the far right or far left of the frame and zoomed out a bit. The "rule" I generally go by when taking pictures of moving objects like cars, boats, bikes, etc is to put the object (granted it's the subject) leading into the frame (in your case, put the boat on the right side since it's traveling to the left), unless you want the focus to be on the back of the object or the trail it's leaving. Either way, I like to leave abut 2/3rds of the frame as empty space to give the viewer a feel of movement. However, In your picture, I feel like the guy kinda looking ahead in the back of the boat could be a cool subject, rather than the boat itself. In this case, I'd put him in the center of the frame with the boat in the left half and water (empty space) in the right half. It's kinda funny how taking a good picture of something so often comes down to the things in the picture that aren't even the focus of it.
Of course, there's no right and wrong and you could totally hate what I suggested - and that's fine. That's what's so cool about art, IMO. I liked your photos a lot too. The one looking up on the boy taking a picture is probably my favorite. I'd have liked the one of him on the bench the best if the coloring was correct. Overall, that's a pretty solid set, especially for someone using his dad's camera!