As long as it is appropriate for the children, I think you are allowed. I'd write it to the off topic though.
Thanks to OwenTheAwesomer for the signature =)
It doesn't need to be in Offtopic if it's LoL-related. You can make a thread here if you wish, though a blog might be more appropriate. Up to you.
Thanks to The_Nameless_Bard for the sig!
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Spoiler: Sona is the main character :)