This is from Amatsuki OST, a children's folk song Tooryanse
(It's only a minute long)

Ideally, I need the vocal part, but I'd be happy with a piano or violin version as well^_^

I think it's all in the first octave.

Here's the link:
http://www.youtube.com/watch?v=GyEcH_n5xBQ

I also have an mp3 version if you need it.

Thank you very much if anyone takes this request!^^