Studies have shown Minecraft to be somewhat beneficial to a child's mind. I can see how considering the Tasks it requires use multiple parts of the brain.
Me, personally, as long as there is no gore or sexual content and it doesn't revolve around killing people it should be ok for the kiddos. Strategy games I find to be the most fun though, such as ROK II and bannerlord. Skyrim is my all time favorite despite the killing and stuff.