Kids at play are a bit like ants or bees. At first glance they appear to be a group whose actions are unconnected but there's cohesion and concerted action there. The photographer has caught this as well as posing a couple of questions. What's the woman in the background doing? She seems to have a sense of urgency and appears to be running but is she and why?
Why is there a female in the bunny outfit there? Then you notice one kid who is the only one in dark clothes who seems to be a little more detached but is he out of the loop or in fact overseeing things?
The best photos ask questions or pose questions and create conversations. This does that.