First off, yes they are real. I don't care what others say. It is very hard to ignore what I have seen with my own eyes. Fairy is a term used to describe a group of creatures and things that aren't human, they walk the line between our world and the others.
Now understand this well, it is very important. NOT ALL FAIRIES ARE GOOD. Infact most aren't. That doesn't make them bad either. They have their own laws and such, just like us. They have rulers and outlaws and wisemen and fools. They are not so different from you and I realy.
Attracting a fairy is easy as pie. They like pie by the way. Anything sweet and tasty they like. Its common to leave buttered honey bread for them, or even buttered toast with brown sugar. After you have given them their treat they will come back. You should always have a snack waiting for them. Eventualy your new friend might ask you if you would like some help with your craft. Also please note that most fairies like alcohol, and some like coffee.
Important thing. NEVER tell a being of other worldly power no, ask it to wait. The only time and way to say no to one of them is with a priest, priestess, or shaman by your side. Saying no just makes them mad.
Lastly, and this is common sense, be nice to your guest. Being mean to an elf or other being can cost you big time.