My DC would play Minecraft all day if I let them (I don't). My advice would be to use it wisely...DS, for instance, loves Minecraft (as do his little friends), so we now own Minecraft books and guides (oh, look, DS, my "non-bookworm," is also reading more!). Also, Minecraft time is "earned" if my DC do something else they might not otherwise want to do (clean their room, finish homework, etc.). It's a win-win!

My DC play Minecraft on the iPad.