Good re-work of the first shot. One comment however; when using overhead, hanging foliage as a compositional or framing device...it's okay to leave a bit of top-space in the frame, to "establish" the foliage within its own space. In this shot, the most-distracting thing is that rusty-red colored fountain or whatever it is in the background...that is just killing the shot,and it also appears in photo #4. Photos 2,3,5,6 all have "clean" and simple and unobtrusive backgrounds, which really helps keep the emphasis on those attractive kids.
Probably the single best photographic bit of advice I could give is to watch the background. Look at the background FIRST, and find a clean, simple background that does not compete with the subjects. As you are photographing people, always keep an eye on the background and watch for objects like that fountain, or cars, people, telephone poles, trees, ugly buildings, and the like. Often times only a few steps to the left or right, or moving the subject just a few feet one way or the other, especially when using a telephoto focal length, will give a clean, simple background.