Spellbound is a quarterly e-zine, also available for download to e-reader, and is produced by small publisher Eggplant Literary Productions.  Aimed at children aged 8-12, each issue is themed around a different fantasy element.  The next theme if you are submitting between October and December is changelings and doppelgängers.  This is an American market and payment is 2.5c a word up to 2,500 words.  They also accept poetry.  Read the guidelines carefully and submit by email with your story in the body of the email, not as an attachment.
This looks like a fun market to try; I like the challenge of having a different theme to write for each quarter.  Just make sure you submit inside the reading period for your theme.