Also on the right side, the controller breaks the motif and catches the eye, both for a visual payoff. But I see no reflection or contrast of controller against candy, nor divider, nor against lego.

Perhaps they are trying to draw a parallel between the shape of the candy and the shape of the buttons, saying that the controller is like candy. On the one side they have toys commonly considered to be educational and therefore healthy, on the other side they have things considered to be unhealthy. By putting the controller on the side with the candy, they are stating that it is also unhealthy.

However, aside from being a partition, I don't see how the chargers relate. Perhaps they're supposed to symbolize the rise in personal electronics, and in doing so, effectively compare personal electronics to candy as well? I mean, if the rise of personal electronics created a box, and candy and Wii remotes are in there, then that means it is also stating that personal electronics are unhealthy.