#1 - This is surely a cherished moment, but the capture is off.
#2 - Love this image. Unfortunately, the thumbs/fingers/digits get in the way. Consider a slightly tighter crop.
#3 - Again, another great moment. however, your whites are blown out, there is no detail in the child's top. I would also take some off the left side of the frame.
#4 - I really like the potential of this shot. There is a power in the young boy. This is well documented. The lines of the receding path are a visual bonus. I don't care for the heaviness of the timber (?) in the upper right, but that can be lessened somewhat. However, there are a few things that distract. Mainly the lighting. This is obviously a late day shot with the long shadows playing their part. You have some very bright parts and some very deep shadows. IMO, what would help are 1) a difussion panel to reduce the harshness of the light source (sun) which would help n the glowing skin and 2) some fill light to lift some of the deep shadows.... particularly in his crotch and shoes... there are no details to be seen.
These all have their merits. Thanks for sharing.