Should a 11 year old play Maplestory

I think they should be able too. My 10 year old brother used to play it and it's not a bad thing. They may get addicted to the game but they also might think of the game stupid after a few weeks (trust me from experience). My brother gave it up after only a little bored. You can take the chance of them getting addicted or every time you mention it they'll say you're really uncool. Personally I think the game wouldn't be fun but that's just me. Go ahead and let them play it.