In so many of his photos there is such a wonderful balance of impromptu human expression with meticulous, geometrical lines and curves. This is no exception, there is the characteristic geometry and he fills every bit of the frame with it- it's hard not to notice the symmetry of the fences tending carefully to the corners and the feeling that every line and contour has a place to be. I suppose this underlying emphasis of (and reliance on) geometrical balance is what most strongly distinguishes his work from that of HCB. Their treatment of time is similar; their treatment of space is very different.
What I think is intriguing in this particular shot is that he captured the kids around the whimsical figure in such a way that the figure initially looks almost like an ordinary member of the crowd. Also interesting is that the child at the bottom is truly in a world of her own, if only for an instant... likewise the figure at top right, and the pair of girls beside the top of the main group.... so many separate lives placed within one neat composition. I get a similar feeling from so many of his photographs.
I hadn't seen this one before; thanks for posting it.