This is a sandbox adventure game. Unlike most sandbox adventure games, this one doesn't lie about the contents - the center of conflict and contention in this game is in fact a sandbox. It's not even a particularly good, nice, or big sandbox, but for one thing, it's the only one, and for another, when you're around seven years old you tend to put more value on things. Even when the bullies kick you out, take the sandbox for themselves, and charge 50 cents a day to play in it. Especially when that happens.
Luckily, all the downtrodden are not necessarily content to sit back and let themselves be trodden upon. A number of them are standing up to the bullies, and, through the power of imagination, are willing to fight back.