The top left (black) kid looks either chained with his arms in the air or has a making a Y pose of sorts.
The girl below that looks like she is being restrained, a white and metallic band surrounds her torso and her arms aren't visible.
The boy behind the girl I'm not sure about. He is the clearest face and appears to be pre-pubescent, or starting. It also looks like he may have an arm draped over the girl, or it could just be the girl's clothing, in which case that in itself is revealing.