Anything I need to be aware of before I let my 10 year old sign on to. Mine craft multiplayer server?  Can I get a virus or computer damage or anything?
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No reason to fear the mine craft servers. There may be some language or inappropriate words shared between multiplayer users. But for the most part, this game only appeals to kids of higher intelligence. Most of the kids who are into shooting games and things would find mind craft boring very quickly.