Unbeknownst to me, there are a TON of different fairies. This is the Tylwyth Teg. She is most popular in Welsh folklore. She is also known as Gwyllion or Ellyllon. The name itself means “the Fairy Folk” or “Forest Family”.
These fair-haired fairy-ish female creatures lurk through the land in search of golden-haired children to kidnap. They replace the human children with a changeling (called a Crimbil). But aside from kidnapping (scary) they also are said to dance, and deliver gifts to their favorite humans, but the gifts disappear if you talk about your good fortune.
There is a legend in which a 3-year old son was taken from his mother. The mother seeks the help of a magician to get him back. She removed the top from a raw egg and began stirring the contents- the changeling, left by the fairy, looked on as she did so. She then went to a crossroads at midnight during the full moon, then obtained a black hen without plucking it and roasted it until every feather fell off— well, this did the trick. Her son was returned and the changeling mysteriously disappeared. Hmmm. Sounds legit.
The Tylwyth Teg are associated with moonlight dances, supernatural passage of time, as well as stealing children.
I may paint/profile some other types of fairies- here’s a list of ALL them: http://zeluna.net/list-fairy cool website.
There’s also a book on all of them, including the Tylwyth Teg here: http://www.amazon.com/Fairies-Myths-Legends-Skye-Alexander/dp/1440573050/ref=sr_1_18?ie=UTF8&qid=1431625977&sr=8-18&keywords=Tylwyth+Teg
and I may just order that book and the entire series because it includes books on Mermaids, Vampires, and wizards! oh my!