Spanish language learning forums

Hi, I'm a fiction writer. My most recent book, about El Salvador, is available on Amazon, but will be officially released In April 2016. I am writing a new book, and I'll have some language questions about Mexican Spanish. I hope someone out there could help me from time to time. Thank you very much!

My first question is, how to say: "Maybe you can do something for me," and "Can you do me a favor?" to be asked by an adult to a young kid of around fifteen years old.

Thank you in advance for your help!

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